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.

Introduce your second grader to the crazy world of static electricity with just a balloon and a sheet of paper.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

Introduce your child to the importance of preserving the world's biodiversity by turning a lesson on endangered species into a fun game for the whole family.

Using scherenschnitte, your science-savvy second grader will be able to create and display each part of a vegetable!

In this science fair project, students use the streak test to tell minerals apart from each other.

In this activity, your child will be challenged to make a tower using paper cups.

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

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

Create a self-portrait from natural materials in this collage craft activity!

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

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

Here's a pressed leaf card project that puts science and writing together for your second grader.

Use pepper and soap to discover some fun facts about the properties of water.

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

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.