By Mark Jewell -- AP Personal Finance Writer

BOSTON (AP) — Nearly all of us have spare change piling up in a jar or piggy bank, or accumulating beneath the couch cushions. But $7,000 worth?

That's how much Clark Pellington's family has collected in coins the past five years. It's a windfall from life's little transactions — change from that cup of coffee bought on the way to work, or a few dimes back from the toll booth clerk.

"I bring home every penny that lands in my pocket," said Pellington, a married 46-year-old financial services professional from Wayne, N.J.

Pellington's 9-year-old son and 5-year-old daughter split the proceeds from the family's coin stash, but don't blow it on toys or candy. Once a month, the kids round up their piggy banks and join mom and dad on a trip to a Penny Arcade machine at a local TD Bank branch.

There, they get a penny-for-penny return on their coin exchanges. The money goes into the kids' savings accounts. Each time one of the accounts hits $1,000, they move the cash into certificates of deposit that earn higher interest than savings accounts.

It's a way to feed the kids' college savings funds, and teach a lesson.

"In a few years, I'll teach them the virtues of compound interest," Pellington said. "A lot of parents sock away money for their kids. But if their kids don't learn how to manage money and save, the message doesn't get through."
It's an opportunity that many parents can take advantage of — the average U.S. household has about $90 in coins sitting idle, according to coin-counting machine operator Coinstar Inc.

Some hold onto coin stashes for years and turn them in when a rainy day arrives. But for many people, that rainy day is here, in the form of a recession.

However, if you do turn your coins in, don't necessarily expect an even exchange. Usually, it depends on how much you're willing to pay for convenience. Here are some options:

YOUR BANK

Coin exchange policies vary from bank to bank and sometimes from branch to branch. Generally, banks will give you back a full return in bills or a credit to your account if you bring in coins sorted in paper rolls. But the policy may not be so generous if you haven't sorted the coins, or aren't a customer of the bank. So you may want to call or check the bank's Web site before you load up on coins to drop off.

TD BANK'S PENNY ARCADES

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