Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

This activity is a great way to teach kids that, to find examples of science in action, they donât need to look any further than their own backyard.

Take to the air with science by experimenting with helicopter seeds right in your own backyard!

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

Have your child kick off their summer vacation by making a miniature water slide!

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

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

This activity is a great way to stretch the boundaries of your child's imagination and build up important critical thinking skills.

This craft is a great way to explore the fascinating world of spiders and their webs as you collect spider webs from around your house with your third grader.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

This science fair project idea creates cool new colorful fabric pattern designs and experiments with the mixing of colors.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

In this simple circular motion experiment, you'll observe tangential velocity and learn about how acceleration and centripetal force affect an object.

Do you think heat can affect a plant's growth rate?

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

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

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

In this design challenge, your child will create a parachute for a small toy using typical household items.

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.