In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

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

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

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

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.

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.

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

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.

This science fair project will help students learn about non-vascular plants, such as mosses.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

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.

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

This science fair project explores how osmotic pressure forces water through the root up into the plant.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

This project compares the strength of one, two, and three-ply toilet paper.

In this science fair project, students use the streak test to tell minerals apart from each other.

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

In this project students experiment with making music using only glasses of water.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

In this project children discover, identify, and sort seeds from a variety of fruits and vegetables

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot move in a pattern related to the sound and rhythm of music.

In this activity, students will think about the form and function of household objects as they compare and contrast kitchen serving spoons of various sizes and designs.

This science fair project examines how seeds hitchhike on animals and clothing.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

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