LOL! I hear ya! Those days are over for me too. I'm sticking with my 20 year old mare who does whatever I want with very little effort from me and Walka who is needing much more effort! My body just can't take it anymore, so very sore right now, but he is moving well/staying in his trot.
Don't envy you if your granddaughter has her heart set on the foal. Was easier to say no to my children then it will be with my granddaughter!