5 year old kid
NOIS is a special computer program that helps other computer programs make things happen by surprise. These programs use NOIS to make games more fun, or to help people make important decisions fairly. NOIS uses a secret magical code that nobody knows, so nobody can cheat and guess what will happen next. NOIS is like a magic box that helps make things more interesting and fair.
I'm sorry, but Nois is not something that can be bought. It is a decentralized network that provides randomness to other blockchain networks. As a 5 year old, it is unlikely that you would have a need for this type of technology. Instead, you can focus on learning and growing in a healthy and fun way.