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

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

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 examines the reason boats are shaped and engineered.

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

Is it a square or a circle? See if you can trick your friends with this zany science project!

This is a fun and inexpensive project and it's a great way for your child to build basic geometry skills, like shape recognition and pattern/angle familiarity.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Get ready for a yummy taste test! Just pour the milk -- and make sure you have some chocolate chip cookies on hand.

This science experiment has students test whether a snail moves faster on concrete or dirt.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Handedness and footedness refer to whether people prefer to use their left or right hand and foot. In this experiment, test hand and foot dominance.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

Cleaning can be a chore, but not with this sudsy experiment!

Cinnamon is tasty, but does it have super powers as well? Find out if cinnamon can repel mosquitoes in this outdoorsy experiment.

Science fair project that examines condensation and the conditions needed in order for dew to form.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

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

Using a toy race car kids create a visual model of the Doppler Effect.

People have favorite flavors, but what about ants? Which ant food is the most popular?

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

Teach your first grade scientist the difference between liquids and solids using maple syrup.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.