The Casio Secret Sender 6000, dropped in 1994, was basically every ’90s kid’s dream gadget—a pocket-sized infrared messenger that let you beam short text messages and doodles to your friend’s device across the room, no cell signal needed. Marketed as part spy toy, part personal organizer, it stored phone numbers, ran on AA batteries, and had that classic chunky Casio look with the tiny LCD screen. It was the follow-up to Casio’s earlier My Magic Diary, adding a slightly sleeker design and the IR messaging capability. It allowed you to text before texting was a thing.