Well, you have a very advanced child, congratulations! Is his name really Bitcoin? : )
iPhone's "Live Photo" feature seems even more useful than the "Invisible Ink" that you shared recently. I you keep posting about it's useful features, my next smartphone will be iPhone.
As it took me quite a while to discover the live photo feature, I am sure there are loads of of other people who don't know it. I was even more amazed to discover the "bounce" photo feature the other day. Probably almost nobody knows that wonderful feature. I should blog how to do it.