Early reading on the most part caused embarrassment in our family. My 4 year old came with me to OB visits and read the IUD literature in the room. Imagine trying to explain IUDs to four year old as the Dr comes in. My second son (at almost three) wanted to know what "all nude, all of the time" and "gentleman's club" meant. Another wonderful discussion that I would have rather put off but one that proved he knew how to read and wasn't just guessing based on previous readings or context clues.