If your MIL likes to people watch, how about a picnic in the park? Or maybe a cookout at your home. Does your MIL remember very much anymore? Sometimes with Alzheimer's, they remember the past more readily than the present. What about getting old photos out from when she was young, and giving her a family tea party? I don't know, luckily my MIL and my mother are mentally and physically fine. Maybe if you tell your H you would like to do it separately this year, and make it special for MIL, and the two of you do something together with your kids the next weekend.
