Here are answers to frequently asked questions about bunk beds for sale. Is 8 too old for a bunk bed? 8 years old is not too old for a bunk bed, as long as the child is mature enough to use it safely.   Can an 11 year old sleep on top of a bunk? An 11 year old should be able to sleep on the top bunk, as long as they are tall enough to reach the top bunk safely and understand the risks...