The device they used was a staff that could bend into shapes such as stars, rabbits, love hearts and lots more.
For it to work well you need to master it.
That is not how clouds are really made.
If I was in charge of welding a device that could create weather, I would choose rain. It would work like a bubble blower. You blow into it and rain comes out where you imagine it.
My device I made using google drawings.