Beverly B

I have a guarantee stateroom and just got my room assignment. I am going on independence of the seas June 5 my room states there is a 3rd Pullman bed available what does this mean? I have a 4 year old so according to royal Caribbean website she is too young for a Pullman bed but she is too old for a crib. Someone told me it may mean there is a bunk bed type of way to do the Pullman beds. Is this true? They are sold out so I can’t get the room changed.