you might start showing him cool things, try to make them fun and teach him something in the process.
I'd say the mentos and diet cola thing but that's super messy and a little hard to explain to adults let alone an average 5 year old. . .
Tina Fey, i wouldn't mind hanging out with her once we finished, palin, i'd want to ***** for being an opinionated asshole that can't help but **** me off
calling fail, is a failure in and of itself, you don't have to be a dick about it because you didn't find it funny.
i am sure the reactions people give his "jokes" are enough for him to know how well he is doing