Leah left a comment with some ideas and she reminded me that I wanted to share some more ideas.
For TheBoy, I'm going to use some of my extensive collection of craft foam and make him letters and numbers that he can take in the tub (they stick to the tile when wet).
Leah also mentioned writing a book and that reminded me that one thing I'm going to do is make coloring books out of photographs. If you have Photoshop, then you have the necessary filters. If not, you can upload your pictures to this site, run the filter, and save the end result.
Now I'm off to get back to work on the bigger kids' Hebrew name bracelets that I'm making. I'll take pictures of those tomorrow, too.