My oldest son is heading into the pubert change of life and getting to be a pain!

Any ideas on how to chill him out...

Maybe we should use Ice

Well its the exact age a child enters puberty depends on a number of different things, such as a person's genes, nutrition, and gender. During puberty, various endocrine glands produce hormones that cause body changes and the development of secondary sex characteristics.
If you are worried that your son may be reaching puberty much later or earlier than your peers, just keep in mind that everyone matures at their own pace.

I say you teach him about the birds and the bees now before its too late!