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

The goal of this fun science fair project idea is to microwave candy and investigate: do some colors of M&Ms melt faster than others?

With this hands-on activity, you'll show how fall colors are hidden in the leaf all year long!

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

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 idea investigates which objects float and sink in honey, water, and oil.

In this CD hovercraft science project, students will construct their own DIY hovercraft.

Science fair project in which you will create your electricity by making a homemade battery using salt water, a nail, and a copper wire.

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

Children use their design thinking skills and powers of observation to create and construct a bird nest.

Challenge your learner to design and build a city of their own in this creative engineering activity.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

Scavenger Hunt! Check out this fun science fair project idea to explore the difference between opaque, translucent, and transparent objects around your house.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

Help your kid feel like a superhero with this safe and fun science experiment that creates an electrical charge that's like a mini lightning bolt!

Do you hate to waste energy? In this experiment, you will design a machine that is powered by the process known as energy transformation.

Try this simple activity with your child to guesstimate the age of a tree in your yard and nurture her developing math skills while you're at it!

Here's an experiment that will have your child experimenting with cake ingredients to learn about the chemical reactions that happen when a cake's in the oven.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Looking for a fun project on energy? Check out this fun elementary school science fair project idea that demonstrates chemical energy in a bottle.

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

Learn about endothermic and exothermic reactions and energy exchange by experimenting with temperature change in chemical reactions.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

Boiling water in a paper cup is possible because of convection and the thermal properties of water and paper. Learn how with this fun science fair project idea.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

How do cold packs work? Explore endothermic reactions by comparing the temperature change that results from various chemicals added to water to find out!