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

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

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.

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.

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.

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

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

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.

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.

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.