Summary

How about a jigsaw puzzle for children's day. This is one of the classical thinks that can be done on a laser. This how-to will guide you through constructiong the tiles in xcs, so you can add a picture of your choice.
This example here is 110mm x 100mm with 36 tiles, each tile 15mm x 15mm. But you can use the same technique that is described here for larger jigsaw puzzles.

Note: This project requires a honeycomb and air assist for perfect results. Triangular prism will not work here.