Hello, my name is Sun and I am 4.6 billion years old and have nuclear fusion!
Thats old! How long are you going to live and what's nuclear fusion?!
Nuclear fusion is when my atoms smash together to create tons of energy which I and many other stars use to make light and heat! And I'm going to live 90% of my life as a main sequence star and then I'll turn into a red giant!
Wow! Sounds big but how are elements even created inside of you?
Through nuclear fusion! I squeeze elements together to make new elements such as hydrogen into helium, and then helium into beryllium until I have created every element up until iron!