November 8, 2011. President #Barack #Obama reacts as a child plays with Lego style building blocks during his visit at a classroom at #Yeadon Regional Head Start Center in Yeadon, Pa. Read more: http://lightbox.time.com/2011/11/11/pictures-of-the-week-november-4-%e2%80%93-november-11/#ixzz1iPo4FK00