Can you run?

I told A2 that I am going to learn tennis this fall. 

He asked me, 'Can you run?' 

I replied, 'Running is using the two legs right? Sure I can run.' 

He thought for a moment and rephrased his question. 'When you were young, did you run fast?' 

This cracked me up. 

I told him, 'I don't think I run fast. But it is ok. I just want to have fun at tennis.'

A2 is concern about the running ability of his friends. He had told me before he did not want to invite a certain classmate to his birthday party because she did not run fast. 

Seb and I explained to him that someone else might be running faster than him and running fast is not a measurement for friendship.

I am taking up tennis so that we can play as a family. Doubt I can run fast. Just do it. For fun.