So, to avoid trying to find "101 ways to entertain yourself at Walmart" I have started putting together activity sheets for a variety of stores in our community. Last year I posted some that could be used at the pharmacy, grocery store and Walmart or Target. Here are the links if you missed them.
html http://empoweredbythem.blogspot.com/2013/02/grocery-shopping-scavenger-hunt.html http://empoweredbythem.blogspot.com/2012/09/superstore-shopping.html
I put together these three worksheets over the weekend that I plan on using this year. It's a good idea to go over the worksheets before you leave for the outing in case there is any explaining to do. I think it also gets them excited to get there and start working. I keep my kids in small groups (2-3 per staff) so that we don't clog any aisle with our presence. I am sure when these stores see a bus unloading a bunch of kids out front of their doors they might be a little concerned. Remember we want this to be a great experience for EVERYONE involved!