The Missing Piece:

Friends James Kaplan, 8, right, and Bjorn, 9, (whose parents preferred to withhold his last name) hang out in the Kid's Gym Oct. 29, 2016 in Berkeley, Calif. Bjorn is also a transgender boy, like James.

Friends James Kaplan, 8, right, and Bjorn, 9, (whose parents preferred to withhold his last name) hang out in the Kid's Gym Oct. 29, 2016 in Berkeley, Calif. Bjorn is also a transgender boy, like James.