All day long, I realize the limits of my knowledge as my DD4.4 asks questions about how email is transmitted across the Internet, how the sun was formed, what is inside of bones, how breast milk is made in the body, how our septic system works,questions about the gas planets, why certain things were given a particular name, the names of obscure things, questions about viruses, and on and on. I usually give an answer on the fly then check it online, and I do just fine, but I am starting to wonder what things will be like in a few years. As she is able to search the Internet better, she will be able to ask the computer some of these questions (not that I am shucking of my responsability). I think all four year olds ask a ton of questions, but hers are nearly continuous. How do you handle this?