In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

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.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

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

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Start your toy engines -- this is going to be a fast and friction-filled race!

In this investigation, an oil spill is simulated in a jar to observe the damage that oil spills have on the ocean and ocean life.

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

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

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

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

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

This science fair project idea determines which method of hand cleansing is the most effective.

How do organic materials become soil? This science experiment measures what materials biodegrade.

This science fair project idea investigates how the shape of an object affects drag.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

This science fair project idea investigates how magnetism can defy the force of gravity.

This science fair project will help students learn about non-vascular plants, such as mosses.

This science experiment has students test whether a snail moves faster on concrete or dirt.

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

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

This science fair project teaches students about wilting and browning of salad greens.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

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

Do different types of oil mix or stack? Find out in this science fair project idea!

This science fair project idea teaches to understand and explore the concepts of crystal formation and dissolving substances.

This science fair project idea investigates if fats add to the flavor of food.