Quoting Colt's mommy:" Grab his hands everytime (gently) and say no hitting. Repeat about 50 times. "
I feel like this is a pretty natural response and I am certainly not knocking it. I do want to offern an alternative. When you say "No hitting" the child still hears hitting, so in sense you are reinforcing the word hitting. Instead of this, when my 14m/o hits, I gently take his hand and say "Be Gentle" and then I model gentle touch while holding his hand. I really believe this is a usefull method becuase you are using language related to the behavior you want your child to do instead of not do, another example is when kids are running in a place when they should not run, instead of "No Running" I say "Please Walk" it is positive redirection.