This is a fun, interactive pen holder toy that combines desktop organization with clever mechanical interactions. Normally, the model remains folded away; when a pen is inserted into the top, it triggers an internal mechanism that causes a hidden character inside the box to peek out, creating an engaging interactive effect.

The model follows a modular design approach, allowing it to be customized with different character designs, themed color schemes, and decorative elements. As a result, the same basic structure can be adapted into a variety of distinct styles. It can serve as a desk pen holder, a stress-relief toy, a tabletop ornament, or even a gift item.

The entire piece is optimized for 3D printing, featuring a compact structure that requires only simple assembly after printing. The gameplay and underlying mechanics remain consistent across different character versions, making it ideal for collecting as part of a series.

The operation is straightforward: insert a pen → the character pops out; remove the pen → the character retracts.