Melissa & Doug Wooden Construction Building Set in a Box (48 pcs) 48-piece wooden building set Includes 12 bolts, 8 nuts, 16 building boards, 6 blocks, screwdriver, and storage box. Storage box is predrilled so it can become part of a structure too! Illustrated building guides show how to create a crane, motorcycle, airplane, and race car. Promotes counting, sorting, and fine motor skills; encourages problem solving and constructive play.