What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

In this science fair project, students use the streak test to tell minerals apart from each other.

This science fair project idea investigates the hardness property of minerals.

Get your child math and science savvy with this fun outdoor classification game. Using chalk, your child will classify what she sees in the natural world.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

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

In this activity, students will be challenged to describe and count the ways a toy moves from one position on a grid to another.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

Help your child create a working lung model that fills with air just like the lungs inside of his own chest when he breathes.

Make edible amber fossils with your second grader to explore the fascinating world of science!

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

Try this chemistry experiment with your curious kid and get some "shocking" results!

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Learn about this simple machine and make a pulley of your own to use for fun science trials.

In this science fair project, students make their own rain gauge to measure rainfall.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Turn an abstract lesson into a practical craft with the fun and colorful creation of dough earth layers!

This taste buds science experiment demonstrates how strongly our sense of smell controls what we taste.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

Grow these wheatgrass and alfalfa friends and watch their hair spring up in just a couple days!

Introduce your second grader to the crazy world of static electricity with just a balloon and a sheet of paper.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.