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.