Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

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.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Develop your child's mathematical and engineering skills with this fun building brick challenge. In this activity, your learner will be challenged to create a boat out of building bricks.

This project leads to an understanding that a whole may be built of smaller parts that fit and work together and provides an introduction to basic tools.

In this activity, your student will be invited to build a chair out of building blocks that is designed to meet the specific size and shape of a small doll or toy figure.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

Using a toy race car kids create a visual model of the Doppler Effect.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

This activity is a fun challenge for students who have just started learning to program educational robots.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

This science fair project idea explores how length affects the weight a bridge can hold.

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot navigate around several obstacles.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

In this activity, students will be challenged to describe and count the ways a toy moves from one position on a grid to another.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

This classic children's game demonstrates how sound travels through air vs. through a solid.

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.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.