As we replace mini-blinds or I see them being trashed; I grab and cut them for plant markers. I bag them 250-300 and trade them for plants at the round-ups! Never seem to take enough.
In my yard I also can testify to the pencil being the last man standing too Horntoad!! One problem I have is one of my dogs made it her job to pull up all those little white things out of mama's flower beds
Now I have to bury them, so the string idea will work great in the future Rick.