I need to smile more but at what price?

As I was walking into my job at church today I heard a little day school student, who was with his class on the playground, say to his friend "There goes a grandma." No surprise that he was talking about me since I was the only non-teacher in the area and I am, after all, a gray-haired grandma.  I turned and smiled and waved at the kids, then continued on my way only to hear the same voice behind me saying "She looks like a mean grandma." Really?  So, I was telling my youngest granddaughter, she's 12, about this incident as I drove her home from school today. She said "Don't smile, show me your resting face." So I did and she informed me that I do have kind of a mean looking resting face. So I smiled and she went on to point out all the wrinkles around my eyes and on my cheeks that show up when I smile. Yikes, now I know what my options are. I can smile and show off my wrinkle collection or not smile and look mean. Or one other option occurs to me. This may be the time to start wearing a burka.