Built for my Lenovo Flex 5 14". One of the keys' scissor mechanism broke. I got the measurements off it and modeled this.
You can either print everything in place, or split the two bodies and print separately although it is tricky to mesh them together later.
Print with tiniest nozzle you have; 0.4mm doesn't work well.
As low layer height as your printer can do. I printed at 0.15

ScissorKB.stl

Just a garden decoration -- a decorative dual-fan wind spinner I designed for the yard. Rotates to face the wind, and spins at even 2-3mph wind speeds with the right bearings.
The two fans rotate in opposite directions.
Needs 3 standard 608 bearings, and may need some CA glue or rubber mallet if they don't fit.

Dual Wind Spinner

This blade gets stacked on top of the other one, with a 608 bearing between the two.

StackedOnBlade.stl

Simple kids toy with handle and fan, where pulling on the wound up string rotates the fan. Once the string stops pulling, the fan lifts and flies off. My kid can easily get the fan to reach the 3rd floor.

The handle and the embedded shaft print in place. Print horizontally with supports. The supports within the gap of the shaft and handle can then be broken off with few turns after printing. Lubricate with lithium grease or oil for best results.

I used a strong, braided nylon string, ~50cm. Threaded and tied off one end through the hole in the shaft, and other got looped for kids to put fingers through.

Handle assembly can be printed in PLA or PETG. I chose to print the fan in TPU, making it a bit safer for my kids. Although any material should work. If you want it to go higher, try making the outer fan ring a bit thicker or some other way to add small weight to the circumference (not a lot, else the thing won't lift up).

PullCopter

Housing.stl

Wanted a pushbutton holder to trigger my sonoff minis. Originally had the regular switches wired in, but this one has a much better wife approval factor.

Fits in the wall plates in place of the regular switches. Thicker plates may need the button part to be made a bit taller.

After printing, fit a standard tactile button with short stem so that the leads poke through, solder wires, and then hotglue the wires and the leads to avoid accidental shorting and mechanical support to the joint.

Tactile switch button, fits wall plate, for shelly, sonoff etc.

frame.stl

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dc0d32

ScissorKB.stl

Dual Wind Spinner

PullCopter

Tactile switch button, fits wall plate, for shelly, sonoff etc.