There is one of these hanging in one of the classrooms at my old church (or at least it used to be there). It was a bible school craft for the older kids one year. I was too little then, but thought it was really neat.
"When Jesus died on that cross, he paid the penalty for all our sins and by doing so, he purchased eternal life for all who believe in him. These Coin-Covered Crosses are a beautiful way to illustrate the price he paid." This would be a great VBS craft!!