WHAT HAVE YOU GOT IF YOU'VE GOT ELMER'S GLUE, A HUNK OF STRING, SOME CARDBOARD, PAINT, AND DUCT TAPE? Hey! Maybe you’ve got an entry in Stony Brook’s Roth Pond Regatta, the world’s biggest cardboard boat race. And these robust papery crafts sail only at Stony Brook, only on Roth Pond, and only in April.