Before starting prepare in advance a largish ball such as a blow-up beach-ball or a bouncy one and write questions on it using a marker pen. E.g. What’s your favourite colour, favourite food, favourite cartoon, etc.
When you start the game throw the ball to any person when they catch it where ever their right thumb is that is the question they have to say aloud and answer. The game can go on for a long time and be used a time filler.