Challenge your learner to design and build a city of their own in this creative engineering activity.

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 activity, children will work on their mathematics and engineering skills as they attempt to recreate the Eiffel Tower out of building blocks!

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

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

This science fair project investigates why the number of visible stars changes from place to place.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

In this design challenge, your child will create a parachute for a small toy using typical household items.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

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

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

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

Have your child kick off their summer vacation by making a miniature water slide!

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

In this activity, your learner will be challenged to create their own tic-tac-toe grid out of building blocks.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

The goal of this project is to create an exciting topographical map out of dough.

In this activity your child will create their very own marble maze!

This science fair project idea identifies clouds as a means of predicting the weather.