In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

Will the shape of an ice cube impact how fast the ice melts?

This science fair project idea provides evidence that air is everywhere and takes up space.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Learn about the effect of artificial light on plant growth versus natural sunlight and delve into some biology and botany concepts in this science project.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

Will increasing the amount of salt in water effect how slow or fast the water freezes?

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

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

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

This science fair project idea explores how far the âdanger zoneâ is from different types of caution signs.

Construct batteries that make electricity from fruits with this fun science fair project.

This science fair project idea experiments with spinning color wheels and optical illusions.

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.

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

In this Bernoulli's Principle experiment, you'll learn how an increase in the speed of a fluid, like air, decreases pressure.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

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?