This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

This science fair project idea identifies clouds as a means of predicting the weather.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

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.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

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

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

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.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

How do organic materials become soil? This science experiment measures what materials biodegrade.

In this science fair project, young children notice and track changes in trees throughout the year.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

This super fun science project, perfect for young children, combines crafts, dressing up as animals, outdoor play, and life science learning.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

Are your taste buds up for the challenge? Put tongues to the test with this science fair project that examines who enjoys sour flavors more, adults or kids?

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

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

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.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.