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

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.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

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

Incorporate some math and science thinking into your annual fall fun with this pumpkin investigation activity! Your child will have a blast investigating various ways of measuring pumpkins, making estimates, taking measurements, and recording their findin

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.

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

Determine whether butterflies like to drink sugar water, salt water, or plain water.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

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.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

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

Have your child kick off their summer vacation by making a miniature water slide!

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

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

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.