I don't know about the UG, but you might want to checkout the "Birnbaums Walt Disney World for Kids by Kids". My DD6 and DD3 really loved looking at all the pictures and having me read it to them. Just a suggestion. Hope this helps!
I didn't even know there was an UG for kids. We have purchased the BB for kids twice. This last trip was the first time my kids really got into it. My 9 year old loved reading the whole thing, but especially the tips from kids. She was constantly reminding us what she had read while we were at the parks.