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

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

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

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

In this science project, the center of gravity is explored.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

This play-activity causes young children to focus on and become more aware of their sense of hearing and the power of their ears.

Help your child get to know the least-appreciated of the five senses, the sense of smell, with a smelling station.

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.

This science fair project idea examines liquids of different densities.

The objective of this science fair project is to investigate salt water density.

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

This science fair project teaches students the differences between fruits and vegetables.

This science fair project idea investigates whether air has mass and weight.

The purpose of this science fair project is to build a basic radio.

This science fair project idea identifies trees using a dichotomous key.

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

This science fair project idea investigates how color affects temperature.

This science fair project idea explores the egg's thin membrane.

This science fair project idea explores which fruit molds the fastest.

Construct batteries that make electricity from fruits with this fun science fair project.

This science fair project idea demonstrates that plants give off water.

This science fair project idea researches the effects of acid rain on plant growth.

This science fair project idea deals with the qualities of shade on a sunny day.

This science fair project idea examines the reason boats are shaped and engineered.

This science fair project examines how seeds hitchhike on animals and clothing.