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Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Invite your kindergarten scientist to conduct this color mixing experiment to discover which primary hues make a rainbow of secondary colors.

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

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

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

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

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

By incorporating natural materials and the powers of observation, your child will become a backyard naturalist while building early writing and drawing skills!

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

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

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

This science fair project idea explores whether talking to a plant will help it grow.

This science fair project idea examines how well individuals can remember a story they were told and how accurately they pass that story along.

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

In this activity, your child will be challenged to make a tower using paper cups.

The objective of this science fair project is to test the growth rate of a plan in a crystal medium in comparison to traditional soil.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

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.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

This science fair project idea determines if the color of light affects the growth of plants.

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.