Turning the kitchen or classroom floor into a racetrack becomes more than mere noisy fun with the Ultimate Car Kit. Following on from Dorling Kindersley’s successful Spy and Flight kits, this new compact box contains everything the young mechanic needs to build a fully operative chassis with motor and gears, and then to fit round it a dragster, a dirt-track racer, a 4-wheel-drive off-road vehicle, an F1 racer or a sports car. The working parts are simple and pre-formed, the cars are shaped from tough card, while the construction manuals are lucid and detailed, each step illustrated with sharp photographs. The Ultimate Car Kit costs pound;19.99 from DK. www.dk.comschools