Making kids smile in aisles

I had a wonderful moment walking to work, under umbrellas behind this mother and this little 3 or 4 year old girl. Like a beautiful JD Salinger moment, I was grumpy, wet, cold and she was being held in her mum's arms, looking back over her shoulders at me. This pure soul with sparkling blue eys and this almost smile. The smile that she was so madly fascinated with the sky today, but wasn't sure if smiling was allowed on such a dreary day. I smiled at her, and she just lit up. I then stuck my tongue out at her, and she laughed and did the same. It was a pretty cool moment. Made my day til I actually got to work.