Hello, Here is my first project using the hot wind created by a heat source. As the heat of a light bulb in this case. I use two cylindrical magnets Neodymium 6mm diameter x 10mm to keep levitating the propeller. A magnet is on the support and another one on the propeller with identical poles opposed. (You can fix the magnets with a little epoxy glue) The strength of the hot wind is very light so this is an effective way to reduce friction. You can then hang a sheet of paper that is attached around the propeller (With tape) with all the patterns that we imagine to create play of shadows on the walls. I have not printed yet, so it's possible that I slightly modified the parts. (may be slightly to change the spacing between the magnets) At first, I think using drawings made by my daughter but I'm working on several versions of thin cylinders made with PLA with different patterns. I modeled all the parts so that they are printed on my little printer (micro delta) so they get into all other printers normally :-) The support is large enough for a standard bulb but be careful not to put one with a strong power. I'll post pictures when all the pieces will be printed out and I hope you will send me your creations with the drawings of your children for example, I show them to my daughter ... Good print.