This project compares the strength of one, two, and three-ply toilet paper.

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.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Create a brush pile to help wintering wildlife stay warm and cozy through the winter.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

This biodiversity project examines the biodiversity in your own backyard.

Encourage a group of third graders to play this fun game of Whistle Hide-and-Seek as a warm-up to get them prepared for finding a "lost" camper.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

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

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Nature is the greatest teacher, and you can help facilitate the lesson! Here's how to create a supply backpack to get your kid ready for science action!

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Do you think heat can affect a plant's growth rate?

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

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.

Your child can help your family pet take a breather, and help herself relax, too, with this soothing activity.

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

In this experiment we will be determining whether birds prefer certain colors of seed.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

This season is a great time to explore the many shapes, sizes, and species of evergreen trees. Download our "field guide" activity and learn more!

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!