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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.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Would your child like to learn about a hidden world? All she needs to do is open her box of markers!

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

In this design challenge, your child will create a parachute for a small toy using typical household items.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

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

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

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

This science fair project idea examines which type of insulation holds in the most heat.

This science experiment tests if dog saliva can really help heal wounds.

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

This science fair project idea determines if the temperature of rubber effects how high it bounces.

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

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

In this experiment you will replicate the mummification process by making a hot dog mummy.

In this project students experiment with making music using only glasses of water.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.