We bought this for our 6 year old son for Christmas. On the whole it's good - great colourful pictures and funny jokes. The only bugbear is the American aspect, something we were unaware of when we ordered it. There are quite a few jokes about baseball etc, and you can tell some of the tongue twisters are for an american accent.
This is a beautiful little joke book. Nice size for bringing in the car. Lovely images and easy to read jokes. The only downside is that this is a US book and as such some of the terms make it difficult for non American kids to understand, like 'parking lot' and baseball references etc Otherwise a lovely book.