Baby Cribs That Convert to Full Size Beds Explore our baby cribs that convert to full beds with perfect style and proportion. To add value to your crib investment, purchase our adult bed conversion kit, finished with nothing but the finest Greenguard Gold certified paints and stains. Our cribs that turn into full size beds are perfect for a guest room! For a fresh look, purchase the low profile footboard and really make a design statement. At Milk Street Baby, we are passionate about safety, quality and trend-setting style.