Subscribe | UPI Odd Newsletter Subscribe MASON CITY, Iowa, Dec. 12 (UPI) -- An Iowa juggler said he will attempt the Guinness World Record for fastest three-ball juggling as part of a fundraiser for the North Iowa Youth Center. Mark Hanson of Kanawha said he will attempt to beat a Czech man's record of 339 throws in one minute at 4 p.m. Saturday at the National Guard Armory in Mason City as part of the North Iowa Youth Center's Winter Fun Festival, The Mason City Globe Gazette reported Monday. Advertisement Hanson said he is confident he beat the record during his 10 attempts Saturday. He said his personal record is 420 throws. "I have practiced for one minute probably a thousand times over the last couple months," Hanson said. Read More Oldest living dog dead at 26 Man covers car in 33,000 coins Philippines eyes coin line record Stinky tofu eating record set