This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

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

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

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

This taste buds science experiment demonstrates how strongly our sense of smell controls what we taste.

This science fair project idea investigates whether plants can survive being frozen.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

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

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

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

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

What combination of cloth and stain will be the easiest for removing stains? Test and experiment!

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

Deck the halls with last season's Christmas lights for a spectacular and electrifying science activity.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

This science fair project idea explores whether talking to a plant will help it grow.

This science fair project enhances the understanding and awareness of energy use and explores the concept of energy efficient.

This science fair project idea identifies the properties of soap bubbles and invents a new or improved bubble solution.