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Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

The goal of this science fair project is to demonstrate different ways to generate static electricity and record its effects.

In this plant habitats activity, children play the role of an ecologist and take surveys of different areas to discover the best habitat for dandelions.

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

This activity will introduce your child to the four different components of blood and give him a fun way to visualize its properties.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

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.

Science fair project which evaluates different athletic shoes in order to find out whether any of them affect a person's ability to run.

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Learn about different fern fronds with your third grader as you create lacy, natural decorations on your Easter eggs this year.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Unlike other seed sprouting projects, this one allows kids to compare five different sprouts (either 5 herbs or 5 flowers) by watching them grow in a glove.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

We all know that the Moon has different phases, but it can be hard to figure out why. Try this activity to see how the Moon's phases really work.

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

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.

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.