Somewhere this science-fair season, some wiseguy 6th-grader, as the judges approach his empty exhibit with a scowl, will walk to the end of the table, lift up a large plastic barrel, tip it over and all will watch, agog, as the gushing water washes all the exhibits away into a sad little pile of volcanoes, liter-bottle tornados and soggy poster board. "Tsunami," he'll say, bowing to applause and, of course, an A.