Our 3-in-1 cribs transform into a toddler bed or a daybed. Our 4-in-1 cribs convert into a toddler bed or a day bed, and with the addition wooden bed rails, it becomes a full-sized bed! For the "in between years", most of our cribs come with a toddler rail, but the full sized conversion rail kits must be purchased separately. You might want to consider our mini cribs. Some of these convert into twin size bed.