Come to the Expecting Parents Afterwork Party or Kid’s Afternoon at the Brooklyn Baby and Family Expo on April 11, from 3 to 7:30 p.m. in Gowanus. Dozens of exhibitors, gifts, raffles, demo classes for young kids, a sing-a-long with a Grammy-winning artist, new baby talks, and special experiences for soon-to-be moms. They have afterwork ticketsfamily passes for up to three kids, and expecting parents tickets. Plus FREE STROLLER CLEANING from Tot Squad is definitely worth the trip.