In this simple and social activity, children use size comparison skills to find objects in nature that are bigger, smaller, longer, and shorter.

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!

This science fair project investigates why the number of visible stars changes from place to place.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

Want to boost math and science learning? Take a bug expedition and give your first grader practice observing and charting what they see.

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

Show your preschooler how to make a print of a butterfly using her hand as a tool--a great way to stimulate her sense of touch.

Is your little scientist up for a rocky challenge? Let them make their own geode rocks using eggs and epsom salts!

Who knew that nature could get so crafty? Show your kindergartener how to collect and morph pinecones into a whole team of personalized pinecone people.

Introduce your child to science with something they see everyday--their shadow!

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

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

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

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

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Help your kindergarten scientist discover relative size, density, and buoyancy with this fun, pumpkin science project!

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

Your 1st grade scientist will improve her observation skills as she's encouraged to eat healthy by comparing the dry and fresh fruit in this experiment.