Determine if picking up fallen food in 5 seconds or less prevents the transfer of bacteria from the ground.

This project examines Newton's First and Second Laws of Motion with a bicycle and water balloons.

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

This experiment explores the trend of reactivity in the alkaline earth metals as you go down the second column of the periodic table of elements.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

This cool physics demo illustrates the simple harmonic motion of a pendulum while teaching kids the important concepts of potential and kinetic energy.

In this activity, your child will be challenged to make a tower using paper cups.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

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

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

This optics-based science fair project idea teaches kids about real and virtual images with a mind-bending candle illusion inspired by Pepper's Ghost.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

Build a magnetic linear accelerator using a ruler, neodymium magnets, and small metal balls in this fun science fair project exploring magnetic propulsion.

Science fair project that tests the effects of diluted soap on the size of bubbles blown from the solution. Will dilution cause smaller bubbles?

This science fair project idea determines whether eating before or after exercise is more beneficial to health and performance.

Cleaning can be a chore, but not with this sudsy experiment!

Check out this cool science project idea to explore the differences in feeding behaviors of birds and if other species of birds also have color preferences.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

Create your own light bulb and test filaments of different thicknesses to see which keeps the bulb burning for the longest time.

Construct and experiment with a periscope using reflected light rays to gather an image.

A fun, life science sxperiment idea idea involving strategies for keeping birds away from crops using a distress call. What kind of distress call works best?

Examine the effect of pressure on carbonation in soda.

A cool physics science fair project idea for 7th grade exploring the application of distance, velocity, and time equations.

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.

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.

This science fair project idea determines whether dogs can be trained faster using a food reward or praise.

More height, more steep, more speed! This science project investigates whether there is a correlation between the height of the roller coaster and the slope.

Score a bull's eye with this cool science fair project on horizontal projectile motion. Guide a marble to its target and predict its trajectory using math!

Discover whether a metal will expand under hot water.

In this physics project, you'll learn how to find the maximum height of a projectile using some math and trigonometry.