My first and third children are various combinations of this, my first was harder in many ways (not necessarily do with being first, she has Aspergers), but my 3rd... Oy... She's an amazing astonishing little person but she does.not.stop.talking (including in her sleep some days)... And for the most part she's not asking deep quetions about how things work but instead about how people think and feel, which I actually find harder a lot of the time... "Why is the sky blue?" can be easier than "Are you feeling Angry now?"
HK's advice is very sound. And no, not everyone's kids are like this.... The number of times recently I have had friends with kids a bit younger say "WOW what a difference x more months make!" And I really don't know how to respond to that because the truth is "Well no actually, she was not that different from this x months ago..." Yes she is growing and changing all the time, but the non stop talking has been going on a LONG time now.
