Tell us about yourself!
POV Arduino Fidget Spinner
Easy and cheap lab regulator for any PSU
DIY Guitar Pedal
Easy Jacob's Ladder
Easy 3D Printing
Oh, I'm not at all suggesting some sort of chicanery! Just looking at the steps and parts involved, it should be capable of everything described and more, depending on the programming.
Seconding Leonardo2016's comment. I love this; it's brilliant and so simple... but it's not a Levitron, which is, after all, a legally-protected name. You could get in some trouble.
Chimera: $60 DLP High-Res 3D Printer
Cheap precision drill stand
3 channel Dimmer/fader for Arduino or other microcontroller
safe and simple AC PWM Dimmer for arduino / Raspberry pi
Woven paracord bracelet/watchband
Plasma Bulb with Clock Gear