🧃 Vending Machine

Tap a note in the tray to send it into the slot; the little screen on the machine adds up note by note. Insert exactly the price and the drink drops into the pickup bay; insert too much and the machine spits the last note back out while a speech bubble shows how to split the amount. The ↺ button returns every inserted note to the tray so you can start the turn over, and tapping the highlighted drink reads the question again. Five correct buys in a row earn a star.