That combustion will be on display during Calvins Monster, presented by Boston Childrens Theatre at the Boston Center for the Arts at 2 p.m. Saturday and Sunday and Feb. 11-12. Davy, 19, of Beverly, is music director and conductor for the show, and one of the composers of the original score. Austin already is having an extraordinary career, and it will just get bigger and bigger, said Burgess Clark, executive artistic director of Boston Childrens Theatre. He had an early calling and he is one of those unique kids who can make it happen. At left, Davy leads a rehersal.