They grow up fast. You blink and they're crawling, blink and they're walking, blink and they're running, blink and they're reaching the sink without a footstool, blink and they're reading, blink and they're riding a bike without training wheels, blink and they're rollerskating blink and they're....
It's a foolish effort but you just stare at them in awe, happy they are growing, wishing that never could never change.