i found this website extremely interesting: changepot.

and today i found just 1 penny, at the gas pump at wawa. it was a bit grungy and i scrubbed my hand with sandpaper after i picked it up, but we are 1 penny richer. i think this is going to be a fun game to teach owen the value of money. that 1 penny can turn into $1000, three years later. it will also teach me to use my peripheral vision, as i ran into multiple aisles and one lady at target, as i was searching for change.