Study the impact of environment on seed germination among three materials: soil, paper towel, and cloth. Note when seeds germinate and how well they germinate

This project examines whether humans can intuitively grasp numeric values greater than three.

Check out this cool science fair project on identifying rocks and minerals for kids.

This project compares the strength of one, two, and three-ply toilet paper.

This science fair project idea examines the actual cost of three household light bulbs by testing energy consumption.

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

This project explores how and how much one family can reduce the amount of garbage they accumulate over a three month period.

Store seeds under three different environmental conditions. Plant seeds in carefully marked groups, watch them grow. Compare results.

The project compares three different methods of testing turbidity in water: the secchi disk, spectrophotometer, and turbidity test kit.

Test products which claim to reduce wrinkles, and determine which is the most effective. Test effectiveness over three weeks, using a sample of volunteers.

How do crystals form? In this science fair project, students will use three different saturated solutions to see how different minerals form crystals over time.

In this open-ended activity, students will be given a small quantity of three types of materials and asked to design a prototype for “something that will improve the school.”

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

In this science fair project, students investigate the applicability of Benford's Law to many sets of everyday data.

This science fair project idea investigates food preference of birds.

Examine how the tire treads of a bicycle affect its rolling frictional force. Change tires, test speed performance on different terrains.

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

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

This science fair project idea studies whether a religious sleeping schedule relates to a higher IQ.

The purpose of this science fair project is to investigate whether cooking seeds before planting will speed up germination and growth.

Determine if gender affects the ability to identify different smells.

This science project examines the effectiveness of various types of laundry detergents on stains trapped on a white handkerchief.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

This science fair project idea demonstrates how our fingers prune when in water.

Blend art and science in this hands-on activity that shows your kindergartener how primary colors combine to make secondary colors.

Determine whether magic salt is more effective at melting snow than regular salt. Pour one ounce of salt over the ice cubes, compare the melt downs.