With 546 pieces, this construction kit contains tools, coloured screws, bolts, wheels, blocks and planks; all of which can be pieced together to build even the most complex creations. Build it, bolt it and tighten it! Using the screwdriver and spanner provided, budding young builders simply screw the pieces together to create a variety of imaginative constructions. Includes suggested model booklet. Set comprises 6 separate tubs each containing 91 pieces.