Abstract: A crib convertible to a bed, the crib having a length greater than a width of the bed, is provided. The crib includes a crib mattress support board, two longitudinal and two transverse side panels removably attachable one to another in a crib configuration. Each of the crib mattress support board and longitudinal side panels includes a main member having a length less than the length of the crib and at least one extension member removable attached thereto. Upon detachment of the respective at least one extension therefrom, the main member of the crib mattress support board is convertible to a headboard of the bed, while the main member of each longitudinal side panel is convertible to bed mattress support of the bed. A kit for forming one of a crib and a bed, and a method of converting a crib to a bed are also provided.