If you like to be instructed by trippy 1970s cartoon characters, Prof. E. McSquared's Calculus Primer is good.
http://www.amazon.com/Prof-McSquareds-Calculus-Primer-Interg...
I first encountered this book when I was about six years old, and my mother was using it for a calculus class. I didn't understand the content by any means, but I enjoyed the cartoon characters. Despite not understanding it, the book helped instill in me a fondness for math.