I know what you mean about the fishing line. I tried to do that once. I wanted to punch someone. I had no idea I was so fumble fingered. Elastic ones should be fine. Happy wrestling. :P
I recently bought a pack of really flimsy ponies from the Dollar Store with no metal bits. They snap as soon as I try to stretch or twist them into my hair, but do you think they`d be safe to use to attach my plants?