In most churches, one can light candles when saying prayers.

At St Winnow in Cornwall, we noticed something quite different. A bowl filled with water was standing on a table next to a bowl filled with pebbles. Those wishing to make a prayer, are invited to take one of the stones and place it into the water, instead of lighting a candle. We were told by someone working in the church that the stone dropping is a Celtic Christian tradition. I have since read that it might also have been a pagan tradition.