Thanks, everyone, for the kind words.
The Ark is cut from 1/2" oak. The plans call for 1/4" but I know a 10-year-old would break that too fast. I also know this will get broken, but I don't mind that, I love the kid.
It measures about 15" wide by 10" tall.
As for the new neighbor, I think he's pretty much figured I'm a half-bubble off from being plumb.
Bill