Well, there are the tag albums we've already made for a swap. You could make up one of those, say with 6-10 pages on a keyring ring-thing or ribbon. Everyone could use a Disney themed. If you go with the Fab 5 you don't have to worry about children or their gender.
You could make page kits. The mats, blank topper, tag, journal box & shapes/squares using a color theme.
The before mentioned paperbag albums.
Oh, I know, you could make all occasion cards. That would be a cool one.