I can't overstate how much I liked books as a kid, so I really like these memory bookplates. The idea is simple: on a bookplate, record recollections of your child when you were reading the book together, then stick it inside the cover. When your kid revisits the books later, it'll be like love letters from the past.
Thanks for the idea, Kate! Readers, she's giving away free bookplate printables over at her blog, Kate's Creative Space
(Image: Kate's Creative Space)