A PURIM MYSTERY

Plates, with delicious chocolates and mouth-watering pastries, mysteriously appeared at the neighborhood doors every Purim, for several years. There was no card nor any identification. The chocolates and pastries were delicious, the best ever, but where did they come from? Three eleven-year-old boys, declaring they were now mature, stayed awake one Purim night and kept watch. What they observed was amazing. What was revealed?