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In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

Science fair project in which you will start a fire from scratch without using matches or a lighter.

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

In this cool experiment, learn about the forces of resistance in a liquid and race marbles in a cylinder to find out which fluids have a high viscosity.

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

How can Hooke's law explain how springs work? Learn about how Hooke's law is at work when you exert force on a spring in this cool science project.

The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

Explore this fun middle school science fair idea to learn about photosynthesis and the key role of light in the growth of green plants.

Bake some cookies with an oven that collects sunlight and traps the shorter wavelengths (heat!).

This science fair project examines whether ocean water can be made safe to drink.

This science fair project idea tests the efficiency of short term memory.

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

Science fair project that determines the relationship between the temperature and the rate of cricket chirping. How many times do crickets chirp each minute?

This experiment investigates whether smell can be used to enhance test subjects' memories.

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

The goal of this science fair project is to demonstrate the effects of oxidation by writing a message in invisible ink made from lemon juice.

Cherries usually burst with flavor, but in this science experiment they burst with osmotic pressure. This science activity will blow your curious kid's mind!

The objective of this sociologically-inclined experiment is to evaluate whether kids' toy preferences are hardwired or develop as they grow.

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.

Create uphill flow of water by using a siphon. Create vacuum by suctioning one end of tube, and submerge it under water. Watch the direction the water travels.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Science fair project that determines which types of clouds are best at blocking harmful UV radiation.

Help kids tap into their inner inventor by teaching them how to make peanut butter through trial, error, and lots of taste testing!

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

This classic children's game demonstrates how sound travels through air vs. through a solid.

It has long been believed that weather influences mood and behavior. This experiment will evaluate if weather can really impact the way people feel.