Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

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

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

This science fair project idea investigates how the shape of an object affects drag.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

This science fair project idea determines which method of hand cleansing is the most effective.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.