All four sides are stationary and include an adjustable three position mattress support base to add to the security and stability of this versatile crib. It has a well built construction made of solid wood and wood products, offered in a selection of non toxic, durable finishes. Designed for multiple stages of life; it converts from a full size crib to a toddler bed, to a daybed, to a full-size bed (full size bed rails not included). Complete your nursery look by adding an assortment of matching accessories: a changing table, chest, dresser or Tuscany glider and ottoman by Stork Craft. Set-up this extravagant piece effortlessly with it�s easy to follow directions into a crib that�s perfect for your babies?sweet, delicate slumber. Truly a wonderful piece of furniture.