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.

In this project children practice the scientific method while playing with puffy paint.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

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

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.

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

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

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.

Test your friends to find out if you can replicate the placebo effect's incredible results.

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

This science fair project idea investigates if fats add to the flavor of food.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

This classic children's game demonstrates how sound travels through air vs. through a solid.

In this experiment you will replicate the mummification process by making a hot dog mummy.

Help your child make a beautiful homemade sandcastle that will last!

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

Here's a pressed leaf card project that puts science and writing together for your second grader.