i was wondering the same thing and couldonly think of "unpleasant" odors "drifting" from the bathroom spreading thru the room????
backpacks , naps and listening to what anyone says about any restaurant( varies too much by tastes, who is cooking ect) are the worst tips imo
...and wondering why if you don't have money to spend for souvies you don't just give the same amount you spend( in
Walmart or whereever pre trip ) to the kids in the park. that's what we always did...you have $XX for what ever you want...no offense but how fun is it to come back and have new pjs...( sorry, i can just picture the looks on my kids faces.."no you can't have that book/toy/candy cause you have a surprise in the room" and have them get pj's 6-8 hrs later after thay have been building it up in their heads to the point where they are figuring a real live pony must be sitting on the hotel bed waiting for them

) many stores had areas by the check out with less expensive things( ie pencils, little toys and tablets ect.) so we would just steer them there.( also saw them last time we were there)
so i just gave someone else a tip
they can use as the worst tip ever

!