P.M.
Pretty normal boy or girl behavior. It's his job at this age to explore – it's a compulsion for many littles. Here's a video of Dr. Harvey Karp's technique for getting on the child's wavelength. Once they know you really understand what they want, it's often easier for them to deal with the disappointment of not getting it, and the tantrum is often averted. This is a great technique; it has worked well with my grandson, and I get great reports from other parents who have tried it.
http://www.youtube.com/watch?v=fJ1428uYs2g&NR=1&a....