My kid's school is doing a thing to raise money. You put coins and bills into jars, with point values enumerated for the various denominations. You can also put "silver[-colored] coins" into other classes' jars for negative points.

penny = 1pt
$1 = 100pt
$5 = 500pt
$10 = 1000pt
$20 = 2000pt

nickel = -5pt
dime = -10pt
quarter = -25pt

Neat idea.

But, as an agent of chaos, my mind immediately goes to dollar coins, half-dollar coins, and $2 (among others) bills -- and then to foreign currency.

The phone you grew up with was a -

#poll

Please boost for a wider demographic