There is a great new IPO, LNS Change Bank. You could buy as many as 3500 shares. It's a great company dedicated to making change for every customer. You want 345 ones and 5 nickels and 475 pennies... you got it!
get 249 singles and 100 dollar bill. then wrap the 100 on the outside of it. ask your mom to drop you off at the mall and let people think your rich for an hour or 2 or until mom picks you up.