Richer, Morris Man Returns From Idaho Treasure Hunter Claims $10K Prize By MICHAEL FORSTER ROTHBART • Special to www.AllOTSEGO.com Kristian House, proprietor of Oneonta’s former Monkey Barrel Toys, loves puzzles. In fact, he’s found a way to make a living by solving them. In the decade since he moved back to the county, he’s earned income as a toy store owner, math teacher and writer of crosswords and math problems. (His crosswords show up in newspapers including the New York…