AM6450 Excavator Toy (VS2504)Memory building, Balancing, Sensory Perception and Co Ordinative Skills. The loader arm can have vertical movements. The construction trucks are well made and don't have any sharp corners, Safe for kids to create their own base. The bucket and the hinged boom on rear can move, with the boom being free to operate throughout the breadth like the real vehicle. This product facilitates in the development of the childs motor skill and hand eye