A tradition at preschool

We had at the preschool where I work a circle with candles to celebrate Advent. It is a tradition only for our preschool as far as I know.
We prepared a room with a candelabrum and soft Christmas music. The children (today there where 30 children in the age 1-5 years old) walked in to the room in silence and was seated on the floor. One by one walked together with an adult to light their candlestick. The circle of light grew long and beautiful.