In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

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

This taste buds science experiment demonstrates how strongly our sense of smell controls what we taste.

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

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

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.

Find out whether putting something on top of a plant will inhibit its growth.

Do different types of oil mix or stack? Find out in this science fair project idea!

Find out which kind of bubble wrap fares best when put in impact.

Find out whether packaged seeds actually do expire in this new science fair project idea.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

This science project allows students to study the psychology of happiness.

Introduce your child to the amazing, almost magical phenomenon of static electricity!

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

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

This science fair project idea explores which fruit molds the fastest.

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

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

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

This science fair project idea explores the different properties of matter.

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

Help your fifth grader execute this experiment involving a lit candle (submerged in water!) to show him the wonders of heat energy transference.

On the next chilly, winter day, invite your fifth grader to make a hand warmer by experimenting with the loaded combination of a few natural ingredients.

This project determines what category of person is most likely to be ticklish.

Examine the effect of pressure on carbonation in soda.

The goal of this project is to create an exciting topographical map out of dough.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

Explore the chemistry of latex polymers with this outrageous, hilarious science activity.