We got this for our son last year, and have to say it's very simple to play, but really great fun, and unlike many modern games is actually quite sturdy and well made for a change.A lot of games tend to get played a few times, and then stuffed at the back of a cupboard, but we've found this gets played more often than most.
Also, it doesn't use batteries, which is really good to know, as quite often, the batteries get left in a game for ages, and then when you do decide to play, it won't work as the batteries have leaked inside!
At this price, I couldn't recommend it enough if you're looking for a good fun game, that'll last longer than Christmas! and they had plenty of stock.
BTW The next best price I found was Tesco.com £10.99, so for £7.99 it's an absolute bargain (well IMO anyway, as I paid £15 last year!).
Want to know what the games like? well here's a video trailer for the game I found on Amazon....http://www.amazon.co.uk/gp/mpd/permalink/m35RZD8OLYSEFE/ref=flash_player_2_preplay/280-9344828-9891061
Just cut & paste into your browser (needs flash player)