On the lighter side, Youngest Son (YS) has been reading The Way Things Work, that entertaining work which uses mammoths to illustrate principles of science and technology. (I recommend it.) YS decided to recreate the descriptions of various scenes involving levers and mechanics using Legos, a small stuffed mammoth, and some yarn. He did a darn good job, too--his improvised pulley worked. Hours of fun acting out scenes from the book . . .