This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

This science fair project idea investigates how color affects temperature.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

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

Children combine an acid and an alkaline substance to simulate a volcano eruption in this fun experiment.

This project investigates the affect of storage temperature on microwave popcorn.

On the next chilly, winter day, invite your fifth grader to make a hand warmer by experimenting with the loaded combination of a few natural ingredients.

Teach your child how to make an all-natural, yellow-brown dye, using just walnut shells and water. This deep dye can be used on textiles, art, and wood.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This science fair project idea produces sounds by creating vibrations using different objects.

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

Unlike other seed sprouting projects, this one allows kids to compare five different sprouts (either 5 herbs or 5 flowers) by watching them grow in a glove.

Take advantage of the spring and summer sun in this arts and crafts activity that has your learner creating pretty flower prints.

In this design challenge, your child will create a parachute for a small toy using typical household items.

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

This science fair project examines how seeds hitchhike on animals and clothing.

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

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

In this activity, your learner will be challenged to create their own tic-tac-toe grid out of building blocks.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

Deck the halls with last season's Christmas lights for a spectacular and electrifying science activity.

This science fair project idea explores the different properties & interactions of sugar molecules.

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

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

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

Perk up your front porch with this hanging vase craft, perfect for spring and for getting kids outdoors!

This science fair project explores how osmotic pressure forces water through the root up into the plant.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.