Electric Pencil Sharpener
What you get
Sharpen some pencils — and your engineering knowhow — with a pencil sharpener you built yourself! Follow step-by-step DIY 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)!
Product line:eureka Crate
From the desk of the product designer:
Behind the design
“What do innovators, inventors, artists, and engineers have in common? All their ideas start with pencil and paper. With this pencil sharpener and holder combo, you'll always have a pencil handy too for your next great idea.”
By the numbers
Motor's gear ratio: 1
Trigger switches tested: 7
Exclusive Eureka pencils in this crate: 4
Great 9th birthday gift for a grandson. "Mom" very pleased also a useful project beyond demonstration Kiwi Crate projects!
My son absolutely loved this! He is drawn to motors, and inventing, so even at 11 years old he was able to build it by himself. I definitely recommend this!
The Electric Pencil Sharpener was a great starter project for me and my son. The directions were very clear and it was a great hands on engineering project.