Anybody who has played Rush Hour must know the nice feeling you get when you finally pass the 40th puzzle, and the bad feeling you get when you realize that it is over. Well Rush Hour has made three expansion packs of 40 new challenges each. Each will sharpen you concentration an logic skills.Rush Hour Four comes with a Yellow Taxi escape car and 40 new challenges from Intermediate to Grand Master. Now Grand Master might sound scary but it's basically the same as Expert. It would have been better if you in some of the Challenges you needed to clear both Taxi and Red car as in the second expansion, but this is still a wonderful addition to an already great game. Remember that you must own Rush Hour to use this expansion. A DEFINITE MUST BUY!