Sharpen some pencils — and your engineering skills — with a pencil sharpener you build yourself! Construct the core, add the battery, and wire your mechanism up. Then learn about the invention of pencils, the evolution of sharpener design, and hidden engineering features that help your sharpener work smarter!
Cornhole Catapult
Fire Lab
Electric Pencil Sharpener
Original price was: $24.00.$7.20Current price is: $7.20.
999 in stock
