This semester, my after school bible class concentrated on learning the books of the OT. To reinforce this memory work, the children made a bible felt craft with the OT books listed, learned an OT books song and received your pen to help them memorize these books. What a great reinforcement and gift for all. The only suggestion I would make to the company is to NOT put the bar code stickers on each pen. Removing that sticker took a long time and a lot of broken fingernails!