Host Mo Rocca shows us the art of the folding pop-up greeting cards; the inventor of shoes that grow along with the child's foot; tents that are taking to the trees; and, how electricity first moved from the lab to the home.

Host Mo Rocca shows us the hands-free peg leg crutch for leg injuries; the latest inventions for pregnancy and babies; smelling the world with your phone; and, the reading book that taught our ancestors.