This is what is making us smile today. (Except when I told Isabella we couldn’t play it again because it’s lunch time. Then there were tears.)
Warning, parents, at the end of the video is the original title in which there is a word that you may not consider appropriate for children. (Where the H*** is Matt?) Also appears if you click through the link to the original site.
Also, Matt explains how the videos came about here (scroll down and there is a three part lecture recording.)