Stool made from bike parts and crutches
This is a nice instructable made from old crutches and miscellaneous bike parts. The best thing is you can adjust its height. I like the design, but crutches are pretty expensive, so unless you have access to broken ones, it’s a bit prohibitive. I love the design though, it’s a really good example of repurposed objects.
Stool made from bike parts and crutches [link]

by Robert
"The distance is very far. I would have no doubt that you could control it from 100ft -200ft or more. ..."