Kids won't want to miss the Transit Museum's fleet of vintage busses, on display just once a year as part of Atlantic Antic. Families can board the busses, talk to bus historians and bus drivers, or attend one of the many workshops offered throughout the day. Stop in at the "Education Depot" tent to design a bus with cool details and features. If you need a break from the crowds, check out the vintage subway cars at the New York Transit Museum (this event's organizer); admission is just $1 all day long. The bus fest is location on Boerum Pl between Atlantic Ave and State St. All ages.