This project compares the strength of one, two, and three-ply toilet paper.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

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

Test whether plants can grow without sunlight and water.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

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

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

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

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

Do you think heat can affect a plant's growth rate?

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 explores whether the process used to dry the beans we eat for food renders them unviable.

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

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

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.

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

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

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

The possibilities are endless with this fun Halloween-themed STEM activity! With simple supplies, your child will experiment, adapt, and use their creativity while they build structures using different specifications.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

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

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

This science fair project teaches students about wilting and browning of salad greens.