Wow. Daughter of Kali and lima bean, your responses are incredibly defensive and super-snarky. I'm just suggesting that Coloring Books are unnecessary, something that no one had even posited in 30 posts in this thread, which absolutely floored me. I cannot understand why people would want to spend a dime on them.
While you might not feel that you are overtly telling your child that they CAN'T draw their own pictures by giving them Coloring Books, what message do you think you are sending them by telling s/he to FILL.IN.THE.BLANKS. Yes, that's just my opinion, but it is supported by the Waldorf philosophy, as well as other early childhood development and educational philosophies, such as Reggio.
Perhaps instead of exercising your sarcastic muscle, you could explain to me your philosophy about why giving a child a drawing made by an adult and telling the child to color it in is preferable to allowing the child to experiment with their own imagination? Coloring Books amount to busy work in my opinion, not something that enhances a child's development. If merely keeping your child occupied is your goal, so be it, but it isn't mine. I aspire to more.