In considering sturdiness, we looked at what type of wood and/or industrial wood products (like fiberboard) were used when constructing the individual parts. Made of quality materials: We wanted a crib that would last a minimum of four years for one child, and possibly much longer as a crib may be passed down to other family members or converted to a full-size bed.Safe: To be safe for an infant or toddler to sleep in, a crib should comply with Consumer Product Safety Commission requirements, which all cribs sold in the United States do.