Ms. Lily is standing by the front table, her hands on her hips, her smile completely gone. "Class," she says, her voice low. "I have a terrible announcement. The Valentine cupcakes are... gone." You rush over. Where the silver platter was, it is now totally barren. No platter, no cupcakes. Not a single crumb. Not a smear of frosting. You look around the room. Three things stand out: - Desk Mess: Kevin's desk, which is already the messiest desk in the world, now has a tiny, dark red smear of frosting on the corner. - Open Window: The window, which was definitely shut before recess, is now cracked open just a little bit. - Quiet Suspect: Maya, who usually runs around, is sitting silently at her desk, staring down at her shoes. Which clue do you investigate?