How to Turn Leftover Food into a Science Experiment

Whoever said "Don't play with your food" never learned how to turn leftover food into a science experiment

Grab an apron and convert your kitchen into a chemistry lab with ingredients you can find around the house!

From DIY tie-dye to marshmallow molecules, join us as we reduce, reuse, and recycle leftovers and food scraps into some exciting science experiments! 


Science experiments that look good enough to eat!

Science and chill

This (literally) cool fan-favorite science experiment is not only delicious, but dives into the science behind this classic sweet treat. 

Chemistry rocks! 

Check out the chemistry behind candy with this crunchy and colorful creation.

DO play with your food!

Never trust a molecule, they make up everything

This make-a-molecule activity is a great way to introduce little learners to chemistry or and makes a delicious study tool for rising researchers!

Dig in!

If your little learners really DIG dinosaurs, step into the role of paleontologist with a chocolate chip cookie archaeology activity for kids!

Science is sugar, spice, and everything nice

If you need to give your sweet tooth a break, check out what to do with leftover candy! You'll love this sweet take on STEM!

Turn scrap food into science

You don't need a Ph.D. to make your own pH indicators 

Turn your leftover fruits and veggies into natural DIY pH indicators and use them to test the pH of things you find around your home!

Try this DIY tie-dye

Did you know that you could use avocado scraps to make fabric dye at home? Learn how to extract tannin from the pit and skin of avocadoes!

Rise and (coffee) grind!

Real fossils can take 1000s of years to form, but you can make your own in about an hour using coffee grounds

A Sweet Archaeology Activity for Kids

Dinosaur lovers will really dig this sweet archaeology activity for kids! 

When paleontologists dig up dinosaurs, they think about a few things. One of the things they think about is where the fossil was found, or its context.

Where in the dirt? Was it near the surface? Deep underground? Was it near footprints? Next to a fossilized tree? Where a fossil was found can tell us more about it.

If you dig dinosaurs, this archaeology activity will turn kinds into junior paleontologists!


  • Paper
  • Pencil
  • Ruler
  • Tray
  • Toothpicks aka your chisel and hammer
materials for activity

Step 1:

Place your paper on the tray.  This will be your excavation area.

 On the blank side of the paper, use the ruler to mark out a 5cm x 5cm grid.  Each square in the grid should be 1 cm down and 1 cm across.

Label the boxes across the top A, B, C, D, & E, and the boxes down the side 1, 2, 3, 4, & 5. 

a 5 x 5 archaeology grid for activity

Step 2:

Place the cookie in the middle of your plate on top of the squares you drew.

Very carefully, chip the cookie dough away from one chocolate chip.  Watch your fingers!

archaeology activity for kids

Step 3:

Try to excavate as many chips as you can. Use the grid to remember where you found them, and make note of unique shapes or sizes.

recording your archaeology cookie


You have now excavated your chocolate chips and noted their position just like a paleontologist does with a dinosaur skeleton. Each numbered square helps them remember where they found a fossil.

an excavated cookie activity for kids

Expand on the activity!