What's my age again?!?!?

This past week was my birthday and the kids remembered!  Now, keep in mind they think I am 72.  Without saying a word, they informed teachers and peers that I was turning 73 (yay, they can count up and retain information learned months ago)!  Again, they are still in shock that I am, "so old".  They still believe it, still think I look good for my age, and STILL tell me I am older than their grandmas!!!