Can you fool your eyes and your brain with an optical illusion? The purpose of this science fair project is to demonstrate various kinds of optical illusions.

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

This science fair project idea explores whether mint, known for its âcooling sensationâ really does lower temperatures.

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

Learn how to make marbleized paper with simple everyday ingredients in this fun activity! Your child will learn about oil and water while doing this project.

In this activity, your child will learn about a style of gardening that uses moss, also called "kokedama."

Help your child plant a "tea garden": a garden made of herbs for making teas.

Help your fifth grader embrace the roots--literally--of Mother's Day by growing carnations to honor mothers in you family's history.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

In this experiment, students will discover how heat and pressure turn clay into slate, phyllite, and finally schist.

In this game, players will learn interesting facts about animal adaption and practice them using a fun matching card game!

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

Give your local birds a treat — and your young birdwatcher some fun — with this simple DIY bird feeder.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

Lead your first grader on a nature walk ... with a scavenger hunt-style twist! They'll try to capture photos that correspond to paint chip colors.

The possibilities are endless with this fun Halloween-themed STEM activity! With simple supplies, your child will experiment, adapt, and use their creativity while they build structures using different specifications.

Celebrate April Fools' Day with a science prank that is sure to amuse...and educate too!

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Based on the concept of water's "freezing point," this activity entails the lowering of water's freezing point to chill ice cream!

Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.

Will increasing the amount of salt in water effect how slow or fast the water freezes?

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot move in a pattern related to the sound and rhythm of music.

Let your young scientist explore a brave new world of sound with an experiment that just requires a handful of common household items.

Study science with your first grader in this arts and crafts activity that models the reason why fall leaves change color with some paint and crayons.

Engineers in training can get started with this simple wheel-and-axle construction activity.