The Melissa & Doug Wooden Construction Building Set in a Box comes with 48 wooden pieces including nuts, bolts, drilled bars to connect, and a child-size screwdriver to help budding builders get the job done.This set of 48 sturdy pieces includes building plans for a crane, motorcycle, aeroplane, and racing car to get the fun started. Promotes counting, sorting, and fine motor skills; encourages problem solving and constructive play. Age 4+