Machine Teen: History 101001 Digest
Relatively simple story of a boy who has more to him than meets the eye (hint: it's called Machine Teen). Very nice art style and believable characters. There's nothing groundbreaking here but it's all well put together and satisfying enough.
If you're after something simple to get children into comics or can find it on sale (as I did) then it's worth it, just don't expect a classic.