Determine which factors promote the greatest memory interference. Administer test, time how long it takes subjects to complete different tasks.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

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

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

This science fair project idea focuses on saturated and unsaturated lipids (fats and oils).

Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.

Help your kindergarten scientist predict and observe as she explores the science of smell...and have a great time doing it, too.

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

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

This project will explore whether music influences physical endurance.

This science fair project idea explores whether color affects a person's emotional state.

The objective of this science fair project is to investigate salt water density.

Science fair project which helps you determine your latitude by using an astrolabe, which measures the angle between the North Star and the horizon.

Make homemade lemonade in a baggie with your preschooler with this fun and easy recipe.

This experiment evaluates if people of a specific gender or age more likely have an elevated number of taste buds, allowing them to taste what others cannot.

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

This science fair project idea determines whether the hand a person writes with relates to which side they will choose from in a fake taste test.

Science fair project that evaluates how well clothing fabrics block UV radiation by examining the properties of different fabrics.

Check out this fun science fair project idea to explore how building on different types of soil affects the relative stability of buildings in an earthquake.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

Salmonella and E.coli are common food contaminates. This experiment measures the time it takes for E.coli and Salmonella to reach hazardous levels in fish.

This science project idea determines how people recognize words while reading.

Compare ability of selected materials to block UV-A radiation. Shine black light though glass at detecting beads underneath. Note color intensity.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

Science fair project in which you will stage an election campaign to determine whether people are more swayed by a positive ad or negative ad.