Hi Kasia,The Pluto Mid-sleeper are ideal for children age 6+ years and perfect when space is at a premium. The Pluto mid-sleeper also has the capacity to be converted into a regular single bed if required as your child grows. This mid-sleeper provides ample space underneath the sleeping area, which can be used as extra storage space for your child's toys, games and books to be stored away neatly. Regards, Micah