This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Camouflage is one of the most important animal adaptations in the African savanna biome. Kids create their own camouflage with this fun science fair project.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

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

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.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

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

This experiment tests which gender is better at catching how a magician performs his tricks.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

You've heard the expression "burn rubber" but do you know how heat affects rubber? Examine the impact of temperature on rubber in this fun science experiment.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

Learn whether writing things down really makes things easier to remember.

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

Wonder why bugs always fly around your lights at night? This experiment determines whether insects are attracted to the heat or the light.

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Cleaning can be a chore, but not with this sudsy experiment!

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

Word color association is just a fancy way to talk about the way we connect colors with words.

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

This experiment examines whether storing your orange juice at different temperatures affects its acidity.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

This science fair project idea examines whether boys and girls differ in reflexes.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

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

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

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.