This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.

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

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

How do organic materials become soil? This science experiment measures what materials biodegrade.

This science fair project idea investigates how color affects temperature.

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

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

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

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

This science fair project idea investigates the difference in reaction times between boys and girls.

Test whether plants can grow without sunlight and water.

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.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

Are your taste buds up for the challenge? Put tongues to the test with this science fair project that examines who enjoys sour flavors more, adults or kids?

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

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

The purpose of this study is to determine if people can tell the difference between organic and conventional food from looking at, smelling and tasting it.

Test your friends to find out if you can replicate the placebo effect's incredible results.

This project determines what category of person is most likely to be ticklish.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

This science fair project idea demonstrates that plants give off water.

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

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

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.