Events include a Family Day outdoor gathering , with music , crafts , health screenings and other activities , tomorrow from noon to 8 p.m. at Commodore Barry Park , Navy and Tillary Streets and Flushing Avenue , downtown Brooklyn , and a beach party Sunday from noon to 8 p.m. at Jacob Riis Park , Baseball Field , Bays 1 and 2 , Beach 169th Street , Neponsit , Queens .