We explored how the wheels work; not just stuck to the side of the car but on an axle which is attached to the chassis, or bottom of the car. We tried just sticking the axle straight onto our chassis but this didn't work, the axle couldn't turn so the car didn't move at all. Instead we threaded the axle through a straw which ensured that the axle was free to turn.
Our models look great, we have turned them into everything from a fire-engine to a rubbish lorry!
We even managed to give our vehicles a test drive outside today!
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