We place a $1-2/ person in the room into an envelope with "Mousekeeping" on the front of it. We place the envelope in the bathroom where it is obvious it's for the maid. If you place it out in the room like on the desk, they are instructred not to disturbe it, and therefore not take it. That's why we place ours in the bathroom. We do this daily through out the trip. This is tipping them for their service just like the baggage handlers, skycaps, towncare drivers, etc. However, we we receive in return is wonderful from the maids. Evertime they have left extra shampoos and other amenadies, towels, arrangements of the kids stuffed animals on their beds, and they can make the cutest towel animals for the kids. Also remember, that they don't make "big bucks" doing this for a living, and so every little bit helps them.