Buddha at Bedtime is pretty good, I think it's put out by the FWBO, or someone involved with them.http://www.amazon.com/Buddha-Bedtime-En ... 1844836231
Probably best for something like ages 8 or older..the art is really nice though, and even my 4 year old could enjoy it, and do some of the simplified meditations.
You could nitpick a bunch about the book as an adult and practitioner, but seriously, I thought it was decent. To be fair, it is mostly folk tales and some stuff (iirc) from the Jatakas...as you can see from the amazon reviews, that irked a few of people. So yeah you won't be able to teach your kid the twelve links of dependent origination from the book (lol), personally I would never expect such a thing, so I thought it was pretty good for what it was.
"Just as a lotus does not grow out of a well-levelled soil but from the mire, in the same way the awakening mind
is not born in the hearts of disciples in whom the moisture of attachment has dried up. It grows instead in the hearts of ordinary sentient beings who possess in full the fetters of bondage." -Se Chilbu Choki Gyaltsen