Infants: Adults build enclosed play area, high chair, change table, etc. Toddlers: Adults build play structures ... house, fort, platforms, vehicles, pool, etc. Pre-Schoolers: Adults assist with construction of lofts, furniture, vehicles, dramatic play, etc. Pre-Teens: Children build their own furniture and structures. Teens: Teenagers design and build their own special construction projects. College: Co-eds use in dorm rooms as cubbies/shelving.