Mel,
I don't know if I ever posted what I used your treat envelopes for last summer. Please excuse me if I am repeating myself. I just wanted others to know how versatile these little envelopes are!
For each of my children I printed a different envelope for each day we were at WDW. On cardstock I printed a rhyme/clue for them to find something in the room that I had hidden for them. These cards went in the envelopes. Each night after they were asleep, I laid the envelopes on the floor by the door so that it looked like they were slipped under it. The first morning I had to say, "What's this by the door?" After that, they raced to see.
Thank you for helping me add a little "magic" to our trip. DS & DD are very naive and still think a Disney "person" came by every night and left them notes, etc.

DH made fun of me doing all of this, but, when he witnessed their reactions, he had to smile. It was worth every effort and then some.
Thanks again.