The best thing I ever learned from my dad was he knew he wasn't the best of singers, but he always knew he was a great entertainer, and I always thought that was a good concept to bring along, that ultimately acting is an entertainment art and you have to be aware of the fact that you want people to be excited to be watching you.
When my kids started preschool, the teachers had to take away all the fake bananas because all the boys would pick them up and pretend that they were guns. Boys find sticks to play swords and anything that looks like a gun to shoot. It's just inside of them. It's who they are.