The most important factor here is price and, thankfully, I Spy: Fun House is very cheap. Its RRP is £19.99 but because of the disastrous title and the fact that the packaging makes it look like one of the worst games imaginable, I guarantee that it'll be hitting the bargain bins very soon.
This is a basic and simple puzzle game for young children. It is fun, and young children will enjoy it. However, it needs more variety and content, and is priced too high for what it is.
If there were more puzzles, or if they were more difficult to solve it would be a better game. The fact of the matter is that this game is made to be played by kids too young to have seen the I SPY books, so why don't they just get the books and get more use out of those?
Nobody cared about yet another shovelware DS game like this cluttering up the shelves. "Why don't you all just buy the books instead if you're so interested?" he thought.