Breimeris Torres (from left), 12, of Jamaica Plain held hands with her sister Banyely, 7, cousin Zayrangie Guerrero, 10, and sister Isthar Torres, 10, as they played in the Boston Common Frog Pond spray pool, which reopened Thursday for the season. Audrina Bowers and Jakob Keaton, both 6 and of Plymouth, played near Frog Pond.