This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

Learn how to grow an avocado plant indoors with your 1st grader in this hands-on gardening activity.

First grade science often covers solids, liquids, and gases. This silly science explores serious facts about the difference between all three.

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!

You don't need to wait for rain to see a rainbow. Make one yourself, and teach your child about light and weather in the process.

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

This science fair project idea investigates how the shape of an object affects drag.

Let your second grader pay homage to an ancient Olympic tradition with this modern day Olympic wreath!

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Start your toy engines -- this is going to be a fast and friction-filled race!

Has your child ever played weatherman? Try this science activity that lets kids try their hands at observing and predicting the weather.

The possibilities are endless with this fun Halloween-themed STEM activity! With simple supplies, your child will experiment, adapt, and use their creativity while they build structures using different specifications.

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

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

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

This easy Halloween-themed science experiment for first-graders is perfect for chilly October afternoons or great as a Halloween party activity.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

This engaging project encourages young children to practice and refine the important scientific skills of sorting and classification.

This science exploration lets your first grader see how eggs can provide a perfect environment for a living, growing creature.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

Help your child get to know the least-appreciated of the five senses, the sense of smell, with a smelling station.

Learn about different fern fronds with your third grader as you create lacy, natural decorations on your Easter eggs this year.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.