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How Do Frogs Drink Water? How Frogs Drink Water Science Experiment

You know we love frog activities for kids here at STEAMsational, and today, we’re diving into the fascinating world of frogs and their drinking habits with a simple experiment to show kids how frogs take in water with this lesson plan for our How Frogs Drink Water Science Experiment! In this experiment, kids will simulate how a frog takes in water to learn more about these amazing amphibians. Whether your students are in elementary or middle school, get ready for a ribbiting adventure that’ll leave them croaking for more knowledge!

Hands-on how frogs drink water science experiment and lesson plan! Easy osmosis lesson plan for upper elementary and middle school.

How do frogs hydrate?

That’s what students will learn in this fun frog osmosis science experiment. Sporting scientist hats, students will discover a frog’s unique drinking methods and learn the hydration secrets of amphibians.

Hoppy Hydration: How Frogs Drink Water Science Experiment

Follow along with this lesson guide to get what you need to teach the how frogs drink water science experiment.

Here’s some background info that will help you teach how frogs drink water and other fun facts about common frogs, what frogs need, how frogs absorb water, and properties of absorption that frogs use to survive.

Materials Needed for the Frog Biology Science Experiment

Take a look at the list of supplies below that you’ll need to do this frog anatomy science project.

This ensures smooth sailing when conducting the experiment with students, allowing us to focus on the fun of froggy exploration without any interruptions!

Take a look at our list of stuff you’ll need to get you prepped and ready for the How Frogs Drink Water Science Experiment!

poison dart frog coloring sheets

Don’t hesitate to explore alternative sources for specialty supplies. Local science museums or educational centers might offer borrowing or rental programs.

Community groups or online forums could also be treasure troves for sharing or trading materials. Remember, a bit of creativity can go a long way in saving both money and time.

Frog Teaching Resources

Here are some teaching resources you can use alongside any study of frogs!


Frog Math Busy Bag

frog life cycle mat

Frog Life Cycle Mat

frog math word probems

Frog Math Story Word Problems Box

tropical frogs memory match game

Tropical Frogs Memory Sort Game

frog timer

Frog Classroom Timer

amazing frogs of the world science kit

Amazing Frogs of the World Science Kit

life cycle sequencing puzzles 1

Life Cycle Sequencing Puzzles

frog life cycle blocks

Real Life Cycle Specimens

frog life cycle specimins

Frog Life Cycle Blocks

frog abacaus

Frog Abacus

fair and square bug kit 1

Fair and Square Insect Kit

sum swamp game 1

Sum Swamp Game

frog growing starter kit

Frog Raising Starter Kit

rainforest frog toys

Rainforest Frogs Toys

frog life cycle puzzle

Frog Life Cycle Puzzle

parts of a frog plushie

Parts of a Frog Plushie

4d frog anatomy model

4D Frog Anatomy Model

frog life cycle kit

Frog Life Cycle Kit

More Frog Projects to Try

Here are some other fun hands-on frog science lessons!

Frog Osmosis Science- How a frog drinks water!

Here is how frogs can drink water through their skin!

Frogs have developed a remarkable and unique method of hydrating themselves that sets them apart from many other animals. Unlike creatures that drink water using their mouths, frogs absorb water directly through their skin.

A special area on a frog’s belly known as the “drinking patch” has skin that is thin and permeable. This means that water can travel through the skin through osmosis.

This drinking patch is crucial for a frog’s survival, particularly in their often humid environments. When it’s time for a frog to rehydrate, it will seek out moist locations like puddles, wet grass, or even just a damp area.

Frogs can sit in a pool of water and allow their drinking patch to make contact with the wet surface. This position maximizes the amount of skin exposed to moisture.

This method ensures frogs stay hydrated, even in areas with irregular rainfall.

Frog Science Books for the Classroom

Here are some books to learn more about frogs with your class!

from tadpole to frog book

From Tadpole to Frog Book

the frog scientist book

The Frog Scientist Book

a frogs life cycle book

A Frog’s Life Cycle Book

frogs scholastic discovery book

Frogs: Scholastic Discovery Book

frog heaven book

Frog Heaven: Ecology of a Vernal Pool Book

frog song book

Frog Song Book

poison dart frogs book

Poison Dart Frogs Book

poison dart frogs up close book

Poison Dart Frogs Up Close Book

face to face with frogs national geographic book

Face to Face with Frogs National Geographic Book

science comics frogs

Science Comics: Frogs

why frogs are wet book

Why Frogs are Wet Book

How Frog Osmosis Works

Here is how osmosis works to hydrate frogs through the drinking patch on a frog’s stomach.

Osmosis is the movement of water across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration. In frogs, this semi-permeable membrane is the skin of the drinking patch.

Interested minds, please join us! In today's science experiment, Hoppy Hydration: How Frogs Drink Water, we're exploring the drinking habits of frogs. Imagine yourself a thirsty, inquisitive frog at a peaceful pond.

Here is how osmosis helps hydrate frogs through the skin.

  1. The drinking patch is located on the belly and the undersides of the thighs of the frog. The skin in these areas is permeable and contains a high density of blood vessels close to the surface.
  2. When a frog sits in a water source that has a lower concentration of solutes (like salts and other dissolved materials) compared to the fluids inside the frog’s body, then the water moves through a frog’s skin into it’s body, which has a higher concentration of solutes.
  3. As the water passes through the skin via osmosis, it is absorbed directly into the bloodstream. This process of direct absorption allows the frog to hydrate itself efficiently without the need for drinking through the mouth.

This specialized adaptation allows frogs to efficiently manage their water intake and helps them thrive in a variety of environments, ranging from rainforests to deserts.

Science Facts about Frogs

Here are some additional topics that you can teach students about frogs alongside the frog osmosis lesson.


Discuss how frogs have adapted to their environments in other his can lead to a broader conversation about adaptations in other animals and how these adaptations help them survive.

Amphibian Biology

Use the topic to teach about amphibians in general, including their life cycles (egg, tadpole, adult), habitats, and other unique biological features besides the drinking patch, like their ability to breathe through their skin and lungs.

Frog Shirts for Teachers

When learning about frogs, wear these awesome frog shirts for teachers!

frogs all over

Frog Hawaiian Shirt

teaching frogs shirt

Teaching Frogs Shirt

frog socks for teachers

Frog Socks for Teachers

poison dart frog shirt

Poison Dart Frog Shirt

dangerous poison frog shirt

Dangerous Frogs Shirt

happy frogs teaching shirt

Happy Frogs Teaching Shirt

cottagecore teacher shirt

Cottagecore Teacher Shirt

teach kids to read frog shirt

Teach Kids to Read Frog Teacher Shirt

100 days smarter frog shirt

100 Days of School 100 Days Smarter Frog Teacher Shirt

teaching is frog shirt

Teaching is Un-frog-gettable Teacher Shirt

read books be kind frog teacher shirt

Read Books Be Kind Frog Shirt

ultimate frog guide shirt

Ultimate Frog Guide Shirt

frog and toad book shirt

Frog and Toad Book Shirt

poison dart frog socks

Poison Dart Frog Socks

frog lifecycle shirt

Frog Life Cycle Shirt

Ecology and Environment

Discuss the importance of wetlands and other aquatic environments for the survival of frogs. This can also include the impact of environmental changes and pollution on amphibian populations.


Teach about the conservation status of different frog species and the importance of biodiversity. Discuss how protecting frog habitats helps maintain ecological balance.

Here are some frog science books you can read with your class before or after conducting this experiment.

How Frogs Drink Water Science Experiment Lesson Plan

Through hands-on activities, students discover the unique methods frogs use to absorb water, delving into concepts of biology, physics, and chemistry along the way.

From investigating surface tension to understanding the role of frog anatomy, this frog science experiment offers an engaging and educational journey into the science of amphibian hydration.

poison dart frog coloring sheets

Get the printable lesson plan for the how to frogs drink water science experiment below and make sure to grab the free frog resources to expand on the lesson!

How Frogs Drink Water Science Experiment

How Frogs Drink Water Science Experiment

Active Time: 3 minutes
Total Time: 3 minutes
Difficulty: medium

One fascinating fact about frogs is that they don't use their mouths to drink. Instead, frogs use osmosis to absorb water directly through their skin into their bodies.

Use this how do frogs drink water science experiment lesson plan to teach how frogs drink through osmosis to elementary and middle school students.


  • Egg
  • Vinegar
  • Salt
  • Sugar
  • Jar


  • Measuring tape
  • STEM notebook/journal
  • Pencils


Here is how to complete the how does a frog drink science experiment.


Students will understand the concept of osmosis and how frogs use osmosis to absorb water through their skin.

Day 1

Introduction (10 minutes)

Begin by asking students if they know how they drink water and how they think animals like frogs drink water.

Introduce the concept that while humans drink water with their mouths, frogs absorb water through their skin. Show a picture or model of a frog and point out the drinking patch area.

Explanation (10 minutes)

Explain osmosis using simple terms: "Osmosis is the movement of water through a barrier from where there is a lot of water to where there is not much water. This barrier lets water through, but not other things like sugar or salt."

Show an animation or video that illustrates how osmosis works, focusing on the movement of water through a semi-permeable membrane.

Activity: Demonstrating Osmosis (15 minutes)

Divide the students into groups of 4-5 and provide each group with the materials to complete the experiment.

First, have students record the length, circumference, and observations of their group's raw egg in the science journals.

Then, instruct the students to carefully place the egg in a jar filled with vinegar until the egg is fully covered and let it sit for 24 hours. 1

Day 2

Exploration (30 minutes)

During the next lesson, have the students carefully take their eggs out of the vinegar and gently rub away any remaining shell.

Have the students record the length, circumference, and observations of the egg in their science journals.2 1

Instruct the students to empty their jars of vinegar used to prepare your frog model and rinse. Pat dry and refill the jar with water.

Place the model in the water and let sit overnight.

Day 3

Observations (30 minutes)

Ask the students to remove their eggs once again and observe any changes. Have the students record the new length and circumference and any other observations they notice. 3 1

Instruct the kids to empty and rinse their jars again. In the clean jar, have the students make a solution of 2 cups water, 1 tbsp sugar, and ¼ tsp salt until all particles are dissolved.

Have the students place their eggs in the jar of solution until the next class period.

Day 4

Experiment completion (20 minutes)

Remove the egg from the solution and look for changes. Record the size and note any observations you make. What happened? Where did the water go? 4 1

Discussion (10 minutes)

Relate the activity back to frogs by explaining that the water moves into the frog's skin (like it moved into the corn syrup baggie) where the inside of the frog has higher concentrations of things water likes to move towards.

Show a diagram of a frog’s skin and point out the drinking patch, explaining that it works just like the baggie in water.

Conclusion and Assessment (10 minutes)

Hand out a worksheet that includes diagrams for labeling and a few short answer questions about osmosis and frog hydration.

Review the key points of the lesson, emphasizing how osmosis helps frogs absorb water through their skin.

Recommended Products

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Here are some fun frog books to read with your students!

Frog Books for Kids

Here are some frog science books and books featuring frogs that you can use in your classroom to go along with any frog STEM activity!

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Amphibians Science Book

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Toads and Other Amphibians Book

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Jump Frog Jump Book

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I Don’t Want to Be a Frog Book

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A Spoonful of Frogs Book

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Kids Explore Poison Dart Frogs

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Science Comics: Frogs

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Tadpole to Frog Board Book

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Reptiles and Amphibians for Kids Book

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Friday 10th of May 2024

Question, at the end it talks about a corn syrup baggie but there is no baggie in the actual experiment. What does this mean?

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