(Book: The Hiding Place) When someone was washing the windows and spied on the ten Boom home, what creative activity did the ten Booms and their 'boarders" begin?

When a man unexpectedly begins washing the windows outside the dining room, Eusie’s brilliant idea to sing happy birthday diverts the man’s suspicions about a large group. Corrie shews the window washer away, but not before inviting him to join in the pretend festivities.

Step-by-step explanation: