The goal of this science fair project is to assess the acidity levels of common food and household products using pH test strips.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

The objective of this free science fair project is to examine the way in which the phases of the moon affect circadian patterns in mammals.

Science fair project that determines whether spreading a moss soup over an area increases moss growth.

Students explore hot desert plant adaptations in this cool science fair project by observing how these organisms prevent excessive transpiration.

Check out this fun high school science fair project idea to identify features of a mushroom and learn how do humans use fungi to their benefit?

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

In this fun science fair project idea learn about the multiple sources of radio waves and fin out how difficult it is to block them.

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

Will increasing the amount of salt in water effect how slow or fast the water freezes?

Get a cool middle school chemistry project idea on how to determine whether a physical or a chemical change has taken place.

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

Science fair project which examines the chemical reaction of a candle flame with various gases in order to determine the identity of the gas.

Explore which teeth-whitening products work best - Whitestrips or Whitetrays.

Free science fair project idea that examines air pollution in local environments. Particles are trapped by petroleum jelly on microscope slides.

In this fun guessing game, your child uses his sense of smell and taste to figure out what is in the container. Here's how to play:

Science fair project that demonstrates how stalagmites and stalactites are formed.

This science fair project idea discovers the principle of conservation of mass.

Science fair project that determines the correlation between the ability of selected materials to conduct heat and a material's density.

Your preschooler can learn how to siphon water with just two bottles and a plastic tube in this fun, educational science activity.

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

This science project allows students to study the psychology of happiness.

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

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

Explore the concept of receptive fields and why different parts of our body have different levels of sensitivity.