Brock has loved stackers for some time. He never stacks them, but he loves spinning the rings on the floor and watching them slowly come to a stop. That all changed yesterday when Brock finally figured out that the rings fit on the stick. The following videos are a bit long, but they tell the entire story of Brock learning how to stack. The story begins with me noticing across the room that Brock had successfully put a ring on the stacker twice! I pulled out my phone, confident that I would capture a third success. That's when we ran into some serious coordination frustration. See for yourself.... By the end of two minutes, I felt that perhaps I was pushing him a little too hard. We would forget about the rings and come back later. But Brock was determined, obsessed. Less than a minute after I had put the camera away, he was back at it. His first attempt of this second session was an instant success that, of course, occurred off-camera. I immediately fired up the camera