The Brooklyn Flea at P.S. 321 welcomes special kids' programming, bringing family-friendly fun to the Park Slope market. Catch demonstrations, workshops and performances each weekend, beginning with creative book-making with 826NYC (Apr 5–6, May 3-4 and June 6–7); playful songs with the Brooklyn Conservatory of Music (Apr 12–13) and demos from Carmelo the Science Fellow (Apr 19) that will make the kids geek out! In June, return for ProjectArt's portrait workshop and exhibition (June 7); a glass-sculpting class hosted by UrbanGlass (June 14–15) and dynamic dancing with the Mark Morris Dance Center (June 21), allowing little ones to try their toes at Samba and hip-hop steps. More events TBD. All ages.