And coloring? >> the creative part of your brain that doesn't get used over the course of the day does get worked and does get used. there is other research with alzheimer's. it's not imperical research but it is suggested that using that side of your brain on a regular basis could improve. >> there is millions of books sold. it explains what's happening. >> i'm having this young man fill in on this edition. the work is so intricate. people like about coloring books there is no correct answer. if i want to make him orange, i make him orange. if i want to make the leaves purple, it's my preroga...