The Harmony 3-in-1 crib to toddler mattress is our top pick for a convertible crib bed. This bed easily converts from a crib to a toddler bed as your baby grows older. It eventually grows into a full bed with a headboard and footboard. This bed has a sophisticated style with sturdy construction using white solid wood paired with natural fabric, a timeless aesthetic that will evolve with your child’s tastes. The fabric used in the construction of this bed is stain, spill, odor, and bacteria resistant. This is a good option for cost savings since your baby will be able to stay with this bed through his or her teenage years. The only thing that will need to be upgraded is the mattress at age six or so. This bed can be purchased from Crate & Barrel Kids for $799.