This was a quick remix of the fantastic original extension by @danmar.

My youngest daughter is short, and she can't reach the light switches to turn them on and off.

So I modified the original extension and created 3 parts. A part that mounts to the light switch, an extension piece to lengthen everything, and then a pull ring that goes on the bottom.

I use 1 of each part to get a good length for my daughter. She loves it and feels super awesome when she can turn the lights on and off on her own.

The openscad file generates all three components. At the top of the file are some variables that can be modified as needed.

Set buildSwitch = true if you want openscad to generate the main part that attaches to the switch. Set buildExtension = true if you want openscad to generate the extension part. Set buildHandle = true if you want openscad to generate the circular handle part.

Only set one of the options at a time and then re-render.

I have included 3 stl files that work well with my north american decora switches.