Activ8 is a system of three short games: See-Saw, a balancing game for Google Glass; Jump Beat, a music beat matching game for Google Glass; and Learning to Fly, a Kinect game where two users keep a virtual bird in the air by flapping their arms in sync. Recent epidemiological evidence points at sitting as being the most common contributor to an inactive lifestyle. We aim to offer a starting point towards designing and building an understanding about how "physical casual games" can contribute to helping address the perils of sitting.