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.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Water, along with soil and light, is a necessary component for plant growth. So what's better for promoting plant growth: tap water, or rain water?

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

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

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

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

How powerful is the reaction between baking soda and vinegar? Find out here!

This science fair project examines how seeds hitchhike on animals and clothing.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

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

This science fair project idea explores substances that cause a bubble to last longer.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

In this project children practice the scientific method while playing with puffy paint.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

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

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.