This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

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

Find out whether a longer airplane will fly farther or a wider paper airplane.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Find out whether packaged seeds actually do expire in this new science fair project idea.

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

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.

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

Determine whether butterflies like to drink sugar water, salt water, or plain water.

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

This science fair project idea determines if the color of light affects the growth of plants.

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

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

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

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

This project examines whether playing music during class helps students learn or if it distracts students from learning.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

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

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!