Back in Missouri, clerk Kristi Williams, at the Dearborn Trex Mart where that state's winning ticket was sold, asked every customer the same question Thursday: 'Have you checked your ticket?' " she told CNN affiliate KCTV of Kansas City.

The Arizona store will receive $25,000 for selling the winning ticket. The payout to sellers varies state to state as it is determined by each state's lottery officials.

The prize for the lottery -- held in 42 states, the U.S. Virgin Islands and the District of Columbia -- swelled to the largest in Powerball history after the jackpot rolled over 16 times without a winner.

It still doesn't match the U.S. record payout of $656 million, set in March by a Mega Millions jackpot. Three winners split that pot.

California added its name Thursday to the states participating in Powerball, with the California Lottery Commission voting unanimously to adopt the mega-jackpot lottery game. Powerball tickets will go on sale in California on April 8.

Lottery officials previously urged winners to take their time coming forward.

Winners should sign the ticket, put it in a safe place and seek legal and financial advice before redeeming it, Missouri Lottery Director May Scheve Reardon said.

In Dearborn, resident Bill Matney said he hopes the winning ticket holders don't "get deluged by a lot of people wanting part of their winnings."

"And that they put it to a good use like charity," he told KCTV. "I mean, who can spend that much money?"

The Hills said they plan on setting up a scholarship fund, and donating to other charities, specifically mentioning adoption advocacy and the Shriners as pet causes.

And when it comes to this Christmas, while Jaiden Hill wants a pony, despite the family's windfall, her mother said, "The pony's not going to be for a while."