Waving with her tail

I picked my boys up from daycare today, and when we came outside we saw a man and his son and their dog. The boys ran up to the dog. I was telling them to ask first if they could pet her. The dad said it was fine - the dog was friendly. She was barking because she was so excited. The boys petted her for a while and then they started to leave. I told the boys to tell the doggy bye-bye, and they both say "bye-bye doggy". As they were walking off, the dog was wagging her tail. Twin B said "Mommy, she's waving bye-bye with her tail"! That's one of those priceless moments. So, what did your kids do to make you smile today?