Codex generated a functional 3D-printable pegboard toy from a simple hand-drawn sketch in under five minutes, demonstrating a novel application of AI for rapid prototyping.

The creator, facing pegboard scraps and a desire for a small toy, photographed a rough sketch drawn with his child and fed Codex just two critical dimensions: 40mm hole spacing and 8mm peg width. The AI produced parametric Python scripts generating precise STL files for pieces, gears, and boards, allowing easy iteration without manual CAD modeling. This approach saved significant time and effort compared to traditional design methods.

The resulting repository offers a 40mm system with seven play pieces, four gears, and two boards, all designed for smooth interaction. 8.45mm holes and 40mm grid pitch ensure pieces fit snugly and gears mesh correctly, showcasing how minimal AI input can yield robust, functional physical objects. The project highlights AI's potential for democratizing hardware creation from simple sketches.