No game, no rules — just talk! Sir Blox (top hat, monocle, very fancy) listens, really thinks about what you said, and talks right back. Tell him about your day, your pets, your best jokes.
A grown-up should tap first. The browser will ask to use the microphone so Blox can hear. What you say is sent securely to Blox's brain to make his reply, then forgotten — nothing is saved. A grown-up should stay nearby.