How did I do it

How did I do it? I have just spent about 3 weeks with 3 of my grandchildren while their parents moved. Man... the 9 year old only wants to play on the computer (she's better at CSI than her mother) and the 4 year old seems to spend most of the time following his younger sister around. The youngest spends most of the time going up and down the stairs. How come I did not lose any weight having to go up and down the stairs so much? I swear that the youngest child is going to be the ring leader for trouble! She can get into more trouble in less time... And to think that I had 3 kids! I dont remember them being as wild as these are, but maybe I just dont remember. I'm tired.