C.D.
What about using a trundle bed-which is a regular twin bed and has another bed that pulls out under it so it wouldnt to much climbing(up high atleast) i also watched on of those nanny shows where their kid was a climber so they had to discipline the kid by taking toys away when they climbed on stuff that they werent supposed to. they also put up signs saying no climbing on stuff like shelves so that they knew they what they werent supposed to climb on