Which sunscreen is most effective at blocking the sun's harmful UV rays? Test the SPF of various sunblock brands in this cool science project!

This project examines the concentration of dissolved oxygen in water, with and without oil.

Is there any correlation between hot tubs and high blood pressure? Kids discover the answer (and its biological basis) in this cool science fair project.

Slime mold is no longer classified as fungi! So what is it? In this cool science fair project, learn how to grow slime mold and explore its behavior.

Learn about our response to scents that existed in our environment over evolutionary time and consider why scents might affect our mood state.

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

This science fair project idea discovers the effect of (high) heat on animal cells.

More height, more steep, more speed! This science project investigates whether there is a correlation between the height of the roller coaster and the slope.

Dive into the world of cooking oil and smoke points to discover just how fast some oils start smoking.

The objective of this experiment is to find out if cooked beans grow faster, if at all, than uncooked beans.

This science experiment explores why leaves change color in the fall and the role of photosynthesis in leaf coloration.

The objective of this free science fair project is to examine the way in which the phases of the moon affect circadian patterns in mammals.

This cool electricity project teaches kids how connecting batteries in series vs. parallel circuits can contribute to different levels of voltage and amperage.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

The goal of this science fair project is to identify the galactic center of the milky way using globular clusters, as found through Google Earth.

The objective of this experiment is to identify common materials that absorb sound waves with the greatest efficiency.

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

In this science fair project, students will try to discover if test subjects can detect the presence of Monosodium Glutumate (MSG) in food.

The objective of this science project is to determine the relationship between carbon dioxide gas and the temperature of the atmosphere.

The objective of this science fair project is to examine the cleanliness of salad preparation techniques.

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

This science fair project idea focuses on two classes of sugars monosaccharides (fructose) and disaccharides (sucrose or table sugar).

The goal of this science fair project is to assess the acidity levels of common food and household products using pH test strips.

In this design challenge, your child will make a bottle rocket using typical household items.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

This science fair project idea determines what household items are good conductors of electricity.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

This science fair project idea focuses on saturated and unsaturated lipids (fats and oils).

The objective of this science fair project idea is to determine whether frozen vegetables have more nutrients than canned vegetables.