Windmills have been around for generations to grind food and create energy. During this challenge, students will use various materials and put their engineering skills to work by creating their own windmills.

Show your class how combining two objects can create a new object in this hands-on science lesson. Students will learn why breaking apart an object doesn't change its mass.

This lesson will make your students realize that even though they take their heart for granted, the heart is working hard to pump blood to different parts of the body to keep them healthy and running!