Phineas and Ferb - participants of numerous stories and adventures, characters and you have prepared a small test. Are you ready for a marathon to find differences, type of air into the lungs and get ready for the rapid solution of problems. On each pair of images is given forty seconds, you need to find the eight differences, the new image will appear on the expiration of the time. Try to find the maximum fine differences to score maximum points. Proceed with the mouse.