I feel like kindness can be taught because if someone is mean and you set a good example and they want to be just like you they will start be kind. You can also teach kindness in a classroom by making everyone be nice to have a happy classroom and people will be asking for help and asking to borrow something. I also feel like it matter on the age.
Could either be an exclamation mark or just a period. It depends on the context and only so little was given
stood there waiting for his friend to come up to him.
