One of Long Island's largest indoor play areas, Once Upon a Treetop invites patrons young and old to come ready to use their imagination and have fun. From offering"open play" time to catering private birthday parties, Once Upon a Treetop is a favorite for children who don't want to sit in the house. Be sure to bring/wear socks—Once Upon a Treetop doesn't allow shoes, strollers or barefeet in the play area.