The NYC Parks and Recreation Department has a slew of activities planned for the It's My Park Day event on Saturday, May 21.
From 9:00 a.m. to 4:00 p.m. there will be such activities as free mountain biking classes (at 9:00 a.m. by 210 Street and 67 Avenue); gardening in the park (at 10:00 a.m. by the Recreation Senior Center); a Zumba class (at 1:00 p.m. by the tennis courts); free tennis lessons (at 2:00 p.m.); and more.
It is completely free to attend this all-day event, as are all of the activities planned.