You know how once you’ve accomplished a task, often the details of it disappear from memory? When I saw the photos of the abacus on Kelly’s blog, I thought, “cool!” before I realized that the project idea came out of Tools of the Ancient Greeks. (Hey, it’s been awhile!)

Over at Pass the Torch, Kelly has a few great pictures of the abacus that her son made, as well as a post about cracking codes and the cipher out of Great Colonial America Projects You Can Build Yourself. If you’re like me and appreciate pictures of projects, head on over to take a look.

Kelly’s giving away a copy of each of these books in the next week - I’ll post a link when I have it. Kelly, by the way, has a book of her own due to hit shelves within the next month or so, titled Empowering Youth.