Boy ideas and story point

So I met this kid this weekend named Max. He was a really cool kid, about the right age of our hero. The interesting thing is Max likes wearing his clothes huge. I am talking grown man large size and he is 7. So I thought what I'd our hero has big clothes. I played around with some designs and then I had a thought, what If he wears big clothes because underneath his clothes is a home made samurai armor. It goes along with the ninja theme. Anyway. Your thoughts