What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

The project determines determine if a sports drink affects the heart rate of a student athlete during exercise.

In this experiment, students will discover how heat and pressure turn clay into slate, phyllite, and finally schist.

This science project idea examines the effect of microwaving on various objects.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

In this game, players will learn interesting facts about animal adaption and practice them using a fun matching card game!

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

This science fair project idea determines what household items are good conductors of electricity.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

This science fair project idea identifies clouds as a means of predicting the weather.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

Students explore hot desert plant adaptations in this cool science fair project by observing how these organisms prevent excessive transpiration.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

Science fair project that determines whether mass and weight are the same or different.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.