This is a highly creative and interactive 3D-printed multifunctional geometric slider toy, combining logic puzzles, hand–eye coordination exercises, and decorative tabletop appeal in one.

• Design: The model features a sleek, elongated rectangular shape in pure white. A semicircular hanging hole at the top allows for easy stringing or use as a handle. On the front, three vertically aligned interactive elements are integrated: a fixed cylindrical protrusion at the top, a smooth circular through-hole in the middle, and a cross-shaped hollow slot at the base.
• Mechanism: The toy’s standout feature is the bottom-mounted cross-shaped slider. By sliding this crosspiece, players can shift it between positions—aligning it with or offsetting it from the central circular opening. This design resembles a simplified version of the classic “window slider” or “Kongming lock,” requiring observation, logical reasoning, and hands-on manipulation to achieve specific goals, such as fully inserting or extracting the cross piece, or coordinating its movement with the top cylinder to perform particular unlocking actions.
• : The toy is produced via FDM 3D printing in a single piece, with a distinct layered surface texture and smoothly rounded edges for a comfortable tactile experience. Its clean, all-white aesthetic makes it an ideal stress-relief accessory for desks or workspaces.
• : Beyond being an educational puzzle, it also serves as a unique keychain attachment or bag‑hanging ornament, blending practicality with playful appeal. It stands as a vivid example of how 3D printing can bring personalized designs to life.