Children discover mechanics as they build vehicles and robots with these exciting sets. Each set includes a wrench, Allen key, screws, bolts and washers, as well as perforated shapes and strips. Simply join with screws and bolts to create 2D and 3D models. Sturdy plastic. Mostly black and silver parts, for a sleek, mechanical look. Also includes gears, a pulley, crank, caterpillar track, see-through cab and play figure.
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