Check out this cool science fair idea on why hard fruits become soft and learn how to compare the sugar content between ripe and unripe fruits.

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

By dropping a magnet through a copper tube, kids observe the cool (and bizarre) braking effect produced by the eddy currents predicted by Lenz's law.

The objective of this science fair project is to test the growth rate of a plan in a crystal medium in comparison to traditional soil.

Slime mold is no longer classified as fungi! So what is it? In this cool science fair project, learn how to grow slime mold and explore its behavior.

Study the effects of wind and temperature on evaporation. Place wet sponges in different environments, check at regular intervals, track time required to dry.

Using a toy race car kids create a visual model of the Doppler Effect.

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

The purpose of this science fair project is to determine whether Green Bags, with or without refrigeration, are most effective in preserving food.

Which bread molds fastest? Explore the different kinds of breads and how quickly they mold, along with the role of preservatives.

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

Science fair project that guides you through how to test the humidity in the environment using a homemade psychrometer.

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

This experiment explores whether caffeine improves athletic performance.

Check out this fun leaf chromatography science fair project idea for middle school students and discover the hidden pigments in leaves.

This science fair project idea explores how water and ice can change the form of rocks.

Science fair project that determines which foods and drinks contain the highest amount of glucose.

This science fair project idea designs safe bicycle routes using GPS.

Fibonacci sequences have been observed throughout nature, like in leaves and flowers. In this project, students find examples of the Fibonacci sequence.

This science project examines the effectiveness of various types of laundry detergents on stains trapped on a white handkerchief.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

This science fair project idea investigates whether rocks containing geodes can be determined from the outside.

Demonstrate the relationship between mass, volume and density. Measure displaced water, and weigh object to calculate mass and density.

Examine how a battery can be made from everyday materials.

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

Looking for a fun project on energy? Check out this fun elementary school science fair project idea that demonstrates chemical energy in a bottle.

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

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.