Fun Things to Do With an Infant?Can anyone tell me "fun" things to do with an infant? I know peekaboo but I don't know where to find the "fingerplays" or anything like that. There's also got to be more that you can do with them before they start to walk or even crawl. How young is too young to give them a piece of paper and crayon and let them have fun with that (closely suppervised of course)?