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Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

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

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

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.

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.

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

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.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

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.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

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

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

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

Discover whether a metal will expand under hot water.

This science experiment has students test whether a snail moves faster on concrete or dirt.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.