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.

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

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

In this activity, your child will be challenged to build a tall tower out of building bricks! The instructions include questions prompts to guide students through the design challenge.

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.

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 will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

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

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.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

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.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

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.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

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

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

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

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

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

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

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.

In this activity, your child will be challenged to make a tower using paper cups.

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

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

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