My son is 5 and in the "daddy let me show you something " stage. We just got through the why stage last year. It drove me nuts but being as I only have him 40% of the year, I welcome all the jabber.
After having him for the week I'm Kinda ready for a break. 5 minutes after I drop him off I'm calling to talk to him on the 2.5 hour car ride. My exwife and I have facetime on our Iphones and its a free call so we jabber all the way back.
Jacob is still in the legos are life stage but has been begging me to go fishing and cast our poles in the front yard all the time. Little turd is getting really good.