Is it wrong to play scratch off lottery tickets with my kids?

I was in a gas station a few months ago and noticed the scratch off tickets and thought it would be fun to play them with my 9 and 12 year old. They loved it so now about once a week I will stop in and buy two or three for us to play together. We play a bingo and crossword that takes a few minutes to complete. I never bought them in the past because frankly I know they are a waste of money but now it's kind of a fun thing my kids and I like to do together. Its a new form of entertainment for us to do together. Is this wrong? Am I setting them up for a future gambling addiction? Teaching them to waste money on stupid crap? via /r/Parenting http://ift.tt/28OmGg6