The wife sent me to the Dollar Store yesterday for some odds & ends. Of course I had to check things out for possible fly tying stuff. They have a bag of 200 foam beads for that dollar. The beads are in various shapes & colors and are drilled for stringing. They have excellent floatation qualities. I believe that could be used for strike indicators as well as poppers.
Photo 1 is 2 poppers. Photo 2 is a frontal of the top popper..
Sorry for the poor pictures but my camera went south.
Tim