knock knock, who's there?

One Tues while I was watching the baby I heard a knock knock in the back side of the house. Odd I thought. My husband was off swimming and Lilly was sleeping who could be knock, knocking? I must be hearing a random sound. I went on with what I was doing when again, Knock knock and again knock knock. OK maybe the neighbor girls needed something, a horse loose or one of them hurt. OK I'll go and check this knock knock out. I listened as it continued with brief stops. I found it in the kitchen window, my garden window. The lilac outside the window was bouncing in a way the breeze wouldn't produce. Yes there it went again, knock knock. Tap tap. A little something was knocking on my window over and over. I tip toed into the room the baby was sleeping in and took out my camera and snapped a photo just as he realized I was there and with shock on his face he stopped the tap tap, knock knock and...... (see photo below)........................off he went. Nice to have such a surprising visit. Reminders we are not a world all our own. We are a world of many.