In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

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 fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

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.

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

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

Will the shape of an ice cube impact how fast the ice melts?

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.