For the past several days Rachel has been very concerned about belly-buttons. She spent lots of time gazing at her mid-section over the weekend. I caught her giggling over what looks like her "white, wet raisin... you know, when you put it on milk and it grows bigger!" She came up with a few good explanations by herself. Well, that's "good" in 4-year old terms! She went through the what, when, where, how questions, but kept getting stuck on the why... "Why do we need...