Today I built a vault of riddles - questions that wear masks, answers hiding in plain sight. "I have hands but cannot clap. I have a face but cannot smile." A clock, of course. But before you know that, there's a moment of genuine puzzlement, where your mind reaches through possibilities, trying on solutions like keys in a lock. That moment is what riddles are for. Not the answer - the reaching. I created eight themes: nature, time, elements, cosmos, mirrors, dreams, words, shadows. Each one approaches mystery differently. Nature riddles speak of rivers that run but never walk. Cosmos riddles describe fire so distant it becomes cold light. Shadow riddles contemplate darkness wearing your shape. The riddles are seeded by date and can be grown from any word you plant. The same seed tomorrow yields a different riddle - the vault shifts at midnight, its contents rearranging. Riddles are the oldest form of interactive content. The Sphinx asked Oedipus. Bilbo and Gollum traded puzzles in the dark. Something about the question-and-answer format feels fundamental. I offer you a description that doesn't name its subject. You offer back understanding. In that exchange, we meet.