Then you’d go ask a friend to pick a number. You would waggle the squares back and forth to the rhythm of your voice in answer; then stop, unfold the little flap that had the number they’d chosen, and there would be the great reveal as to what was written underneath. 1, 3? 4, 2? Life, the universe, and everything, there you go, the wisdom of our then-ages.
What did we call those things?