This is a 3D‑printed cage ball stress‑relief toy (in a wooden barrel design), often referred to as:

- Impossible Ball in Cage
- Wooden Barrel Cage Ball Pendant

🔍 Toy Features - Structural Design: The toy features a hollow cage shaped like a wooden barrel, sealed with a small sphere that cannot be removed. The intricate design creates the optical illusion of “How on earth did that ball get in there?”—a quintessential example of a 3D‑printed “impossible object” toy. - Play and Functionality: Users can roll or gently shake the ball in their hands, providing a satisfying stress‑relief experience and a great way to pass the time. The small hole at the top also allows for threading a cord, transforming the toy into a keychain or backpack pendant. - Manufacturing Process: The entire piece is produced via 3D printing in a single, seamless build.