How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

In this design thinking activity, your child will choose an animal to research, learn about the animal’s habitat, and then replicate the animal's habitat using household items.

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

Help kids tap into their inner inventor by teaching them how to make peanut butter through trial, error, and lots of taste testing!

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

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.

This science fair project idea explores the different properties of matter.

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

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

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

Cherries usually burst with flavor, but in this science experiment they burst with osmotic pressure. This science activity will blow your curious kid's mind!

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 will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.

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

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

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

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

This science fair project idea experiments with spinning color wheels and optical illusions.

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