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in Halloween STEM Activities· STEM Activities

Edible Candy Bacteria Experiment: Bacteria You Won’t Regret Eating!

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Bacteria…

No one likes them, right?

They make you sick and look so gross.

But when it comes to Halloween, it’s time to embrace all things gross and disgusting. Gross out your friends and family by making this edible bacteria candy.

Edible Pitri Dish Bacteria: Bacteria You Won't Regret Eating!

It’s the perfect safe bacteria experiment for kids.

What gives this particular activity a Halloween STEM activity twist is the fact that we modeled our edible bacteria after the real bacteria shapes commonly found in the wild.

It’s super gross, realistic, and the perfect blend of science and holiday fun.

Go here for more science experiments for kids and STEM activities.

Don’t miss the complete list of Halloween science experiments!

How to do the bacteria experiment for kids

We did this fun STEM activity on a whim to see if we could re-create bacteria cultures growing in an ager using edible ingredients.

The kids were aptly disgusted and delighted by the combo we came up with.

These would make adorable little party favors for a Halloween party or a mad scientist party!

What You’ll Need to Make Your Own edible microbes:

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You’ll want to have these supplies on hand before making your edible bacteria candy!

  • Plastic pitri dishes
  • Orange jello
  • Assorted candies
  • Casserole dish (optional)

How to make this edible science experiment you can eat

Edible Pitri Dish Bacteria: Bacteria You Won't Regret Eating!

Cook your jello according to the package directions. You can make it the regular way or the “jiggler” way.

We actually made our own using food coloring, sugar, and some unflavored gelatin powder, which set up much quicker than standard jello.

After the jello dissolves and cools a bit, pour it into your (clean) pitri dishes. Let it set up for about an hour.

We stuck ours inside a casserole dish for easier transport.

When the jello starts to set up, add your candies to make your bacteria. We modeled ours after real bacteria shapes seen in a microscope (which you can see in the picture below).

We didn’t do spirochete because we didn’t have any candies that looked like that.

But if you had Twizzlers, fondant, or something like that, you could easily make this shape.

For mold, we sprinkled sugar on the jello. This eventually melted, but the pattern continued to look moldy.

Edible Pitri Dish Bacteria: Bacteria You Won't Regret Eating!

Return the pitri dishes back to the fridge and let the jello harden completely.

The candies will soften and give the candy a feathered look, which looks even more bacteria-like.

Discuss the different shapes bacteria can have while you eat this delicious snack!

We are absolutely going to make these at our next scientist-themed party.

More Halloween Science and STEM Activities

Try these other spooky science experiments to complete your Halloween STEM activities this year!

Make it a Halloween science party with these activities!

Brain Surgery Leak Proof Bag Experiment

Build a Monster Engineering Challenge

Mad Scientist Lab Erupting Potion

Edible STEM activities!

 halloween stem challenges 

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Filed Under: Halloween STEM Activities, STEM Activities Tagged With: edible stem, halloween, stem activities

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. Through simple at-home science experiments, Brenda developed a passion for science and now works as a STEMed advocate with a team of science educators to create hands-on STEM projects and curriculum for kids.

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What is STEAM?

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

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