My toddler is so difficult. He is 25 months old and she seems so much harder than the others we knows. He has this really horribly tendency to hit out. Of course every time he does it he does on the step, but after the million times I feel like screaming "what don't you understand?". He is always active - running around and has no fear at all. He jumps off everything. I just feel I am always chasing him - saying no or saying sorry. I keep worrying that this is not "normal". What do you think??