...the sound of the boys playing Legos (for over an hour...I repeat...over an hour!) and talking back and forth in deep "macho" voices about all kinds of tough guy things.
...the moment when we bring a new batch of library books home and the kids can hardly wait to dive in. They'll plop down at the nearest available free piece of floor (I usually try to coax them in by the sofa and fireplace) and read and look through the pictures and pass the books around for ages. They usually protest even coming to dinner that day