Gift for child attendants?

I started to think of gifts for our child attendants: 2 flower girls and 2 ring bearers (well, I suppose the elder ring bearer is more of a junior usher, and his gift is taken care of).

What do you think of this idea: personalized books?

Flower girl C likes Scooby Doo, so I think she'd like the Scooby Doo themed book available on the website.
Flower girl L likes dancing, figure skating, and generally being artistically expressive through movement. I think she would enjoy this book.
Ring bearer K plays soccer in the summer, so I think he'd like this book.

I like the idea of giving books. I like to encourage the academic development of children. I also like the idea of personalization. I had personalized pencils and pens. However, "Krista" isn't a common name on personalized items, and when I was a kid it was even less common. My aunt actually had my full name engraved on pencils - that's really neat, especially when you're 9! My brothers both received personal books from that same aunt (I didn't because I was already too old for the books that were available at that time). I suspect my aunt actually ordered from the very same company that I've discovered on the internet - the titles of a couple books are very familiar.

Anyway, what do you think of this idea?