I Spy: A Book of Picture Riddles
If you like the Where's Waldo books; you will absolutely love this series. The hunts are forever different; you're not always looking for the same thing. You might get called upon to find anything from an airplane to a zebra. And when you've found everything that the verses lead you to find, the fun doesn't end.
There are literally hundreds of items on every beautiful and unique spread so you can continue the game searching for new items on your own. You can, and I'm willing to bet that you will. Our family has just recently discovered them and we cannot get enough. They are so much fun, though they are highly addictive. We picked this one up at the library and have since bought all of them for my daughters' home library.
The books aren't especially educational, but they are by far the most entertaining books we've come across in a long time. Everyone in our family enjoys them, from my 4-year-old to her 92-year-old great-grandfather. Really. This is a buyer, but at the very least, one to make a special trip to the library for.