I spent some time with my mom a couple of weeks ago and I had my Pedometer with me. I kept checking it while we shopped. I was Like "mom we have shopped for an hour, walked a mile and burned 100 calories." I told her they recommend walking 10,000 steps a day for good health. She took it from me the next morning and walked 4 miles and about 7,000 steps! She was fasinated by it and told me to get her one.
I've got this one and it can just sit in your purse or hook on your clothes. It's real accurate.
Omron HJ-112 Digital Premium Pedometer at amazon.