Spinning Magnetic Levitation Desk Toy

Instructions:

Uses eight (8) cheap 12mm (D) x 5mm (H) ceramic magnets. OpenSCAD source is included, so you can adjust to whatever magnets you have.

1. Print 1x base, 2x support, 1x endplate, 1x spinner, 1x cap. You may need a brim on the spinner and cap depending on how good your bed adhesion is.
2. Insert magnets into the supports, making sure the polarity is the same.
3. Slide the endplate and the two supports onto the base, making sure the polarity of the two bases are the same. The supports should be about as far apart as the ends of the spinner, but slightly closer together. The supports are very stiff to slide on, so they won't slide afterwards.
4. Insert the magnets into the spinner, making sure the polarity is the same.
5. Hold the spinner over the supports - if it repels both ends, add a cap to the side with the endplate. If it attracts both ends, turn it around then add the cap. If it repels only one end, switch the polarity of one magnet and try again.
6. Hold the spinner over the supports with the cap touching the endplate and let go. You may need to adjust the endplate and/or supports.
7. If unstable, you can print a second endplate and cap, and move the endplates together until they almost touch the points of the caps, then place the spinner.

You can flick or blow on the flaps on the spinner to make it spin.