Eyes on the prize: Sierra Ricci, 11, of Glenshaw, participates in the Allegheny County Marbles Tournament at the Allegheny County Courthouse on Thursday. The top two boys and top two girls will compete in the 93rd annual National Marbles Championship June 20-24 in Wildwood, N.J. (Photo by Lake Fong/Post-Gazette) #Pittsburgh #PGH #412 #NationalMarblesChampionship #Marbles