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

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.

Discover whether a metal will expand under hot water.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

This clay "painting" activity encourages and supports creative development and critical thinking skills.

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

In this activity, students will think about the form and function of household objects as they compare and contrast kitchen serving spoons of various sizes and designs.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

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

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

This activity works well with a group or just with a parent and child, and it can make a great party game since it's both fun and inexpensive.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

Grow these wheatgrass and alfalfa friends and watch their hair spring up in just a couple days!

This weather spinner will improve observation skills by encouraging children to examine and track weather details and patterns.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

Popsicles aren't just for the summertime, this activity takes cold and turns it into a creative and tasty science experiment.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Try this fun and simple activity to help nurture your child's observation skills and nourish a growing love of science!

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

Your child can explore the wonders of science, and the concept of dehydration, along with creating a healthy and tasty treat!