Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

This activity works well with a group or just with a parent and child, and it can make a great party game since it's both fun and inexpensive.

Take to the air with science by experimenting with helicopter seeds right in your own backyard!

How much water comes out of snow? Explore this timely question with your kindergarten scientist with this easy winter experiment.

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!

How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

Hold a magnet marathon! Explore the power of magnets with your kindergartener in this entertaining and simple science game.

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

Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.

Help your kindergartener expand social studies and science work while creating this lovely bag clip for the holidays.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

Teach your child to dye eggs with natural ingredients from the grocery store. From pink to gold, these eggs are perfect for hiding, hunting or simply munching.

Help children understand the power of germs and the importance of hand washing with this visual activity that introduces the concept of scientific inquiry.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

Satisfy your kindergartener's fascination of different sounds with this easy science project, where they'll use their ears instead of their eyes to identify sounds!

This activity is a great way to stretch the boundaries of your child's imagination and build up important critical thinking skills.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Help your kindergarten scientist discover relative size, density, and buoyancy with this fun, pumpkin science project!

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

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

Alive or not? This yeast experiment you can conduct with your little scientist explores the answer to this timeless question.

Use reusable, recyclable materials--along with a dose of imagination--to build a castle with first grade geometrical forms.

Help your kindergarten scientist understand the concept of surface tension with this simple science experiment.

For your budding first grade scientist, all you need is some simple, natural materials to create an amazing ant farm. Here's how to get started.

Here's a math, science, and social studies activity: help your kindergartener become a "coin archaeologist" by examining how different coins look and feel.

Your kindergartener will make prints of his favorite fruits and vegetables and learn how to organize and assemble his very own book.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

This experiment works due to a simple principle: plants need light. Build a shoebox maze and watch the plant work though the obstacle course, searching for sun.