Dorm room extras that made life more comfortable

What is this “husband” thing really called? Sounds like a great idea. We changed baseboards on the whole house a year ago and now my kid constantly bounces his headboard on the wall when he’s sitting up reading. He has a padded headboard but if his thingy is good I’d rather just remove the headboard - he’s constantly noisy with that thing throughout the wee hours of the morning.