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.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

How powerful is the reaction between baking soda and vinegar? Find out here!

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

The project is to investigate yeast fermentation and its results on hand of latex balloons.

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

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Take a dive into the candy jar with this yummy science experiment.

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.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

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.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

In this science fair project, students use the streak test to tell minerals apart from each other.

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

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Find out whether a longer airplane will fly farther or a wider paper airplane.