What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

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

Conduct a simple experiment with your child to study how dirt tracks change as they age in this 1st grade science activity.

Test your friends to find out if you can replicate the placebo effect's incredible results.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

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

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

Find out whether packaged seeds actually do expire in this new science fair project idea.

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

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

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

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.

Teach your child about recycling and gardening as she re-uses an empty plastic milk gallon jug to craft a swan-shaped plant container!

Teach your first grade scientist the difference between liquids and solids using maple syrup.