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in Science Experiments

Jellyfish in a Bottle Science Project

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Even though we’re nearly in back to school mode, it is still incredibly hot and summer-like at our house. We wanted to celebrate with yet another screen-free activity for kids. To celebrate the (almost) end of summer, we made a jellyfish in a bottle.

We’ve seen these floating (ha) around online for a long time, and we’ve always wanted to try our own version of the jellyfish science project.

Follow the directions below to make your own jellyfish discovery bottle. Scroll to the bottom of the post for more ocean STEM thematic unit ideas!

Make Your Own Jellyfish Discovery Bottle and you won't have to risk getting stung to enjoy the crazy-cool jellyfish. A perfect sensory activity for kids!

You’ll also want to check out the ultimate list of summer STEM activities and the ultimate list of summer science experiments. 

How to Make a Jellyfish in a Bottle

steam challenge cards
jellyfish science project

This discovery bottle was simple to make, and you probably have everything you need to make it right now!  This discovery bottle is the perfect way to keep little ones entertained when the bigger kids are working on school or other tasks.

Supplies for the water bottle jellyfish:

This post contains affiliate links for your convenience. 

Make the jellyfish in a bottle science project and you won't have to risk getting stung to enjoy the crazy-cool water bottle jellyfish.
  • Plastic baggie (we used an old gallon-sized zip storage bag)
  • Plastic bottle (we used a smart water 1 liter bottle)
  • Scissors
  • Permanent marker
  • Blue liquid watercolor dye
  • White yarn or string

Ziploc Sandwich Bags, Easy Open Tabs, 280 CountZiploc Sandwich Bags, Easy Open Tabs, 280 CountZiploc Sandwich Bags, Easy Open Tabs, 280 CountMcCormick Assorted Food Color, 1 Fl Oz (Pack of 1)McCormick Assorted Food Color, 1 Fl Oz (Pack of 1)McCormick Assorted Food Color, 1 Fl Oz (Pack of 1)CORE Hydration, 30.4 Fl. Oz (Pack of 12), Nutrient Enhanced Water, Perfect 7.4 Natural pH, Ultra-Purified With Electrolytes and Minerals, Cup Cap For SharingCORE Hydration, 30.4 Fl. Oz (Pack of 12), Nutrient Enhanced Water, Perfect 7.4 Natural pH, Ultra-Purified With Electrolytes and Minerals, Cup Cap For SharingCORE Hydration, 30.4 Fl. Oz (Pack of 12), Nutrient Enhanced Water, Perfect 7.4 Natural pH, Ultra-Purified With Electrolytes and Minerals, Cup Cap For SharingScissors, 8Scissors, 8Scissors, 8The Mason Jar Scientist: 30 Jarring STEAM-Based ProjectsThe Mason Jar Scientist: 30 Jarring STEAM-Based ProjectsThe Mason Jar Scientist: 30 Jarring STEAM-Based Projects

 

how to teach stem at home

Directions for the Jellyfish Science Project

water bottle jellyfish

First, cut open the plastic baggie along all sides. You will only need one side of the bag for this project. We used the clear side so our jellyfish wouldn’t have any words on her.

Place your finger in the center of the bag. This will become the jellyfish’s head.  The bigger your jellyfish’s head, the more like a jellyfish she will be.

Draw a circle around the center of the bag so you can mark where your jellyfish’s head will go. Tie a piece of string along the marked line.

Cut the bottom of the baggie into little strips. Don’t just cut the plastic into ribbons. Cut off about 2/3rds of the plastic’s bulk, so you are left with eight or so thin strips hanging down.

Reopen your jellyfish’s head and grasp it between two fingers, leaving the bottom open. Fill the jellyfish’s head about halfway with water. Retie the bottom. Hang her upside down so she doesn’t leak while you work on the next part.

Add a couple of drops of blue food coloring to the water. We found that when our water was dark, it was hard to see our jellyfish, so we kept our water light. Fill the bottle with water.

Gently push the jellyfish into the bottle’s opening and arrange her so she’s head up. Screw the lid on the bottle.

If it is done correctly, the jellyfish in your jellyfish discovery bottle will always stay head up. I was hoping she could dive like in our diving fish experiment, but ours didn’t do that. She did float nicely, though!

More Ocean-Themed Activities for Kids

jellyfish sensory bottle

Diving Fish Science Experiment

Shark-Themed Activities for Kids

Water Science: Desalinization Experiment

steam challenge cards

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Filed Under: Science Experiments Tagged With: ocean, stem at home, summer

About Brenda Priddy

Brenda grew up thinking she hated science.

But when her 4-year- old daughter was more interested in reading science facts than fairy tales, Brenda realized she had to learn more about science to keep up with her daughter.

Through simple at-home science experiments, Brenda developed a passion for science and now acts as an advocate for STEM education for kids at her website STEAMsational.com.

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What is STEAM?

STEAM activities for kids promote the idea that science, technology, engineering, art, and math can all work together to help kids become critical thinkers, problem solvers, and innovators!

Join us on our journey to discover just how much fun science experiments can be.

What we do… 

STEAMsational offers STEM and science lesson plans and teaching resources to provide a firm STEM foundation for children in the classroom or home.

All you need to do is find your supplies, gather your scientists, and let the innovation unfold.

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