The Riverhead Volunteer Ambulance Corps will be host its annual open house on Sunday, May 21 from 11 a.m. to 4 p.m. at its headquarters at 1111 Osborn Avenue, Riverhead. Bring the kids down for ambulance tours, crafts, food, training and much more. Adults, bring your wallets for a chance to win some great prizes and gift cards donated by local businesses! Hope to see you there!