Optional castors which allow it to glide across a room are the key component here. Strong and sturdy with or without them, the clean white lines and spacious tabletop create a calming space to work. With the addition of the castors The White Children's Desk becomes compatible with The White Mid Sleeper Bed. Gently pull the desk out when homework needs to be done or some creative play. When no longer in use, just roll it back in and its stored out of the way under the frame of the bed.