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.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

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

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

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.

This science fair project idea examines liquids of different densities.

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.

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

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

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

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

This science fair project idea determines the most effective method of preserving food.

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

This project examines if computer screen and text color affect retention and if people subconsciously prefer combinations of colors that help their retention.

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

This science fair project idea determines if the color of light affects the growth of plants.

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 explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

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

This project examines whether playing music during class helps students learn or if it distracts students from learning.

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

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

This science fair project idea determines which method of hand cleansing is the most effective.