Max The Grown Up

Max is truly convinced that he is a grown up. He argues the fact with me all the time. Every time I tell him he is not big or old enough to do something, he says, "mama I am a grown up. I am not a child". Last night I told him he was such a big boy for brushing his teeth so well and he told me, " yeah, I'm a big boy. I'm old enough to drink beer". I told him he was 3 and not even close to being old enough to drink beer. He advised me at this point that he is a grown up like daddy and he can drink beer. I told him that beer is yucky and he can't drink it until he is 21. He said, "mama don't tell me that". So whats life going to be like for me when he is 13? I think I'm nervous to find out.