Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

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

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.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

Your fourth grader will be astonished to discover the significance and intricacies of his spine as he builds a model of a human vertebral column.

Help your child learn about animal classification with this fun and delicious activity.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

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!

Recreate the fantastic phenomena of solar eclipses with your child using just a flashlight, a quarter, and her very own face!

What happens when eyes see something that the brain knows cannot be true? In this science activity, the brain has to "fudge" it when interpreting what you see.

Using scherenschnitte, your science-savvy second grader will be able to create and display each part of a vegetable!

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

This science fair project idea investigates the difference in reaction times between boys and girls.

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

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

Make a backbone model to explore human anatomy and life science.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Teach your creative second grader about proportions, animals, and proper cutting methods with cucumber carving.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

This science fair project idea examines the reason boats are shaped and engineered.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

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