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

Help your child measure breezy weather in her environment by making a wind vane for kids, a simple version of the classic scientific measurement tool.

How powerful is the reaction between baking soda and vinegar? Find out here!

Explore the effect of wind speed on the burning rate of a candle.

Compare different remedies for cooling the mouth after eating spicy food.

Compare the amount of ozone in various locations with this science fair project that will have your kid create her own ozone strips!

Help your child experiment with the combination of acid and baking soda by making these homemade bath bombs!

Use this fun activity to make an optical illusion picture that helps your kindergartener explore the sense of sight, and sharpen his observation skills!

There is debate about whether chalkboards or whiteboards are better. This experiment explores which leads to better retention of visually-displayed information.

This experiment will explore if magnetism has any effect on the regeneration abilities of flatworms.

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.

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

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

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

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 compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

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.

The purpose of this science project is to investigate which will grow larger plants: compost, soil and Miracle - Gro, a mixture of both.

This experiment provides a graphic illustration of the chemical reaction that occurs when you activate a hand warmer.

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

First graders are learning to think like scientists. What better place to start, then by raising tadpoles? This hands-on activity explores science in action!

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

The objective of this project is to evaluate whether a top will spin at different rates during different phases of the moon.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

Check out this fun science fair project idea to measure bacterial colonies from door handles and explore the effectiveness of different cleaning agents.

The scientific purpose of this experiment is to investigate which material is the best packaging for fragile items during shipping.

The objective of this science fair project is to determine whether there are gender differences when boys and girls view optical illusions.