This science fair project idea investigates the difference in reaction times between boys and girls.

Conduct a simple experiment with your child to study how dirt tracks change as they age in this 1st grade science activity.

In this fun guessing game, your child uses his sense of smell and taste to figure out what is in the container. Here's how to play:

How do we know that air exists when we can't see it, taste it, or touch it? Here's a classic experiment that will teach your kid some basics of aerodynamics!

Help your child learn about animal classification with this fun and delicious activity.

Put a twist on traditional oil painting with this fun science activity that you and your first grader can do together.

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

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

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

This simple experiment serves as an introduction to the greenhouse effect.

In this science project idea learn about working of different types of smoke detectors and find out which one is the most effective for you.

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

The objective of this project is to examine the ways in which a passive solar house may contribute to conservation of energy.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

Get a cool science project idea on a photovoltaic cell and explore the various factors that affect the energy output of the photovoltaic cell.

This science fair project determines which of two chemical agents can be used to release the drug (tea) from hydrogel crystals.

This science fair project idea focuses on saturated and unsaturated lipids (fats and oils).

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Children are imaginative story-builders. Create a shoebox habitat with your child to put those budding creative instincts to good use.

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

Free science fair project idea that examines cheating in school-age children. Project involves a task in which children are tested on various tasks.

Check out this cool science fair project idea to explore the relationship between pulse rate and blood pressure in healthy people.

Check out this cool science project idea to explore how temperature creates annual rhythms that govern plant growth.

Forget store-bought dyes this Easter: color your Easter eggs with natural dyes made with ingredients from your own kitchen in this 1st grade activity.

Challenge your learner to design and build a city of their own in this creative engineering activity.

Is that seed alive or not? Here's an exciting way for kindergarteners to make a seed museum that your child can watch, using simple household materials.

Play this flashlight game with your child to teach him about objects that are transparent, translucent, and opaque.

Science fair project that determines whether brain size is correlated with intelligence.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.