Awww, I LOVE chess!
Have you shown him "Meeting Bobby Fischer"?
I had his chess book when I started to get into it. If you've not read it, it's a very easy read (lots of diagrams and pictures), and Bobby had a very...unique...way of learning to see the board, and his style of presentation is very straight forward. Certainly not a "beginners" book, but certainly a level II read once someone knows the basics of the game.
I've read a lot of chess books (well, not a LOT, but more than 3 <grin>), and this one not only taught me more about the game and made me a better player, but also was a very enjoyable read.
He presents it more like a book of puzzles...logic problems, if you will, and breaks that up with discussions on terms and tactics. Anyhow, it's worth checking out!
http://www.amazon.com/Bobby-Fischer-Teaches-Chess/dp/0553263153
Anyhow, my Dad gave me that, a tournament set and a clock for my birthday (I already knew how to play, I was 11, I think?). I loved playing 5 minute and 10 minute games with friends (5 minutes is a REAALLY short game! Completely changes the style of play...
Anyhow, sorry, nerd ramble.
I would imagine any set they sell on property is going to be a collectors only item and sell in the 200 - 300 range...but I can't confirm that.
Have you looked online?
I have seen a Disney set that was Pirates themed...they called it PoTC: Dead Man's Chess, and the pun made me chuckle.
But, if I were buying, I would want this one!
http://compare.ebay.com/like/161033813142?var=lv<yp=AllFixedPriceItemTypes&var=sbar