This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

This science fair project idea explores the different properties & interactions of sugar molecules.

This project investigates the affect of storage temperature on microwave popcorn.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

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

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Explore if planting seeds in a certain direction will affect how fast it germinates.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

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 it is easier to balance on a narrow ledge or on a rope.

This science fair project idea examines which type of insulation holds in the most heat.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Find out which kind of bubble wrap fares best when put in impact.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

This project examines whether people's taste perception is influenced by what they see.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

This science fair project teaches students about wilting and browning of salad greens.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.