In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

First grade science often covers solids, liquids, and gases. This silly science explores serious facts about the difference between all three.

Create a three-dimensional X-ray of your child's hand in this simple modeling activity. All you need to get started are black paper and drinking straws

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

Introduce your child to the amazing, almost magical phenomenon of static electricity!

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Is it a square or a circle? See if you can trick your friends with this zany science project!

Let your second grader pay homage to an ancient Olympic tradition with this modern day Olympic wreath!

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Make a wish upon a tree with this craft that also helps your child learn more about Chinese culture.

Plants and light seem to be good buddies, but how far does the friendship really go?

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

Using a toy race car kids create a visual model of the Doppler Effect.

How do organic materials become soil? This science experiment measures what materials biodegrade.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

Is your little scientist up for a rocky challenge? Let them make their own geode rocks using eggs and epsom salts!

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

This science fair project idea explores how length affects the weight a bridge can hold.