or is that not possible
i want to make my "bunny army" tool in the mcdonalds

You can use the asset id of shop items instead by using "tool.setModel(insert mesh asset id)"; as for making custom meshes? It is a little more complicated, but SmartLion was able to do it with his creature sim game. I think you would have to use your own server, though.

You could also make bricks appear as tool and hat meshes by using "brick.setModel(insert mesh asset id)".