A complete scientific kit to discover all the secrets of four-wheeled off-road vehicles. Featuring 2 dynamic models of a dune buggy and quad to build, children can discover the way transmission mechanisms work. Age: 8 years and up Approx package dimensions: 28 x 19 x 6 cms Contents: More than 130 interchangeable components (including: complete differential, gears, rims, tyres, panels, bars and pins), assembly instructions Find lots of interesting scientific facts about off-road vehicles and the mechanics of internal combustion engines.