So, if you decided you want to pretend you live in a museum, and you want your baby to pretend he does too, then may I recommend the Baby Box Crib. The crib expands to three different sizes, along with junior, up to 24 months. Periods: 1st: 0 to 3 months (26 x 30 x 30 height) 2nd: 3 to 10 months (26 x 39 x30 height) 3rd: 10 to 24 months (26 x 47 x30 height)