Originally Posted by John C. Ratliff

Okay, Six jours, you're on--take a pebble and stick it in the foam with finger power only. I just tried it on an old helmet, and got an indentation, but no "sticking." Remember, a pebble is a rounded rock ground upon by water, so that it does not have sharp corners. So find an old helmet, and stick it (the pebble) to it with finger power. I think you are going to be surprised.

John