Haba 4 First Puzzles – Construction Site. The puzzle box for children aged 2 and up contains four designs themed around construction sites made from large puzzle pieces. The fantastic designs consist of 2, 3, and 4 puzzle pieces made of sturdy cardboard, which small hands can easily grasp and assemble. Trucks, diggers, cranes, and concrete mixers continually delight little puzzle fans and encourage storytelling. The baby puzzle promotes hand-eye coordination, careful observation, fine motor skills, and language development. Exciting Haba puzzles in a set with increasing difficulty provide immense fun in matching.