FREE: Electric Pencil Sharpener Ages 14+

The listing, Electric Pencil Sharpener Ages 14+ has ended.

Sharpen some pencils — and your engineering knowhow — with a pencil sharpener you built yourself! Follow step-by-step instructions to construct the core, add the battery, and wire your mechanism up. Then learn about the invention of pencils, the evolution of sharpener design, and cool engineering features in your sharpener (like the limit switch, which lets the electric circuit know when your pencil is in the sharpener, causing it to automatically switch on)!

Activities:
Build the base
Learn about the limit switch
Build the core
Read about pencil lead
Add the battery
Wire it up
Learn how to use your pencil sharpener
Read about the design
Learn about the science of switches and circuits
Learn about the history behind penci
Explore:
Switches in Circuits
History of Pencil Sharpeners
Creativity & Invention