The Nursery is the last room you'll visit in area one in the game Luigi's Mansion. It is where the boss of area one, Chauncey is being held. In order to wake him up Luigi must vacuem his rocking horse and then throw a ball at him. He'll get angry and throw you in his crib where you must defeat him. After this you have completed area one and will move on to area two. But not before turning all your ghosts into portraits at E. Gadds lab.