So if you hear “six‑seven!” one day, Remember this in a cheerful way: Not every mystery needs a clue— Some are just fun to say… woo‑hoo! (Illustration: Felix and Amelia walking home, sunset behind them.)

“Is six‑seven a treasure code?” Felix asked on the walking road. “Or pirate gold or secret maps?” “Or something hidden in booby traps?” (Illustration: The kids imagining pirates and treasure chests.)