The Christmas mufti day. Same play as Easter: mufti entry is a block of chocolate, a bag of lollies, or a toy. Sort into hampers wrapped in donated grocery-store boxes and cellophane.
Draw at the carols or final assembly. Biggest audience of the year; publish winning numbers in the last newsletter so the results are public and next year starts warm.
Sell at pickup in the last fortnight. A table, fairy lights, a float tin — the twilight concert crowd buys books, not tickets.