Congrats Jr!
I don't have a nephew, but two nieces. I've had a ton of fun teaching them ways to get into trouble with their parents. Haven't really taught them how to get out of trouble, though. But that hasn't stopped them.
A great way of getting back at my big sister for all the things she did to me when we were growing up.
Only problem is...sometimes I have to babysit for those brats. (god damn you Karma!)