Set up two large glass jars. (Jrs. vs. Srs.) Pennies are positive points for your jar. Silver is negative points, so you put that in the other jar. Example: if I put 10 pennies in my jar and a Sr. puts a quarter in my jar, I have minus 15 points. It's a great way to raise money and have a challenge. Run the event over one week and keep all aware of what the tally is. WARNING: pennies smell and be prepared to roll because the copper just rolls in.