Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

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.

Science fair project that uses muriatic acid to develop fingerprints that would otherwise be invisible.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

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

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

Science fair project which teaches you about the principles of physics within a vacuum by creating a vacuum chamber.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

This science fair project idea investigates how color affects temperature.

Teach your fifth grader about the wonders of wind by making and observing this winter wind chime.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

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

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

In this challenge, students are tasked with creating a car that can be powered by a balloon!

In this fun experiment, we'll find out how color affects heat absorption!

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

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

If your fourth grader is obsessed with all things glow-in-the-dark, then here's an activity that will really light up her imagination!

Science fair project that determines whether mass and weight are the same or different.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

What happens when "coffee-addicts" miss coffee for 1 day? Find out in this science fair project idea!

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

In this science fair project, students make their own rain gauge to measure rainfall.