Isotta is an extraordinary and original transparent car. It is perfect to engage your kids in a new and exciting construction experience. The set includes nine large parts that are already assembled and only need to be properly mounted onto the chassis to get the car moving. It will be fascinating to discover how its internal mechanisms work: check out the pistons, rods, and gears, and see what happens when you shift gears, or find out how a differential unit works unlock the mystery of how your car works isotta is made with high quality materials that are totally unbreakable and non-toxic to guarantee maximum safety and durability. Big, bulky, colourful, with a working steering wheel, the ISOTTA Discovery Car is an incredibly simple and fun way to introduce children ages 3 and up to the wonders of mechanical engineering. Includes: 4 wheels (2 flywheels), chassis, 3-piston motor unit, gearbox with 2 gear and neutral settings, differential unit and flywheel made in Italy with shatterproof, non-toxic materials. Three large clear pieces fit together with the wheels and chassis to create a vehicle for displaying all the major mechanical movements that make a car run See the front fan twirl with the crank shaft causing the pistons to move up and down in succession. Finally, kids see for themselves exactly how a differential gear system works. Observe gear as a means of transferring power from the engine to the rear wheels. Flip the switch and kids quickly understand how different gears can alter how much power is transferred