I work at home with the horses, and I have a boarding house that I clean. So he gets to hang out with me if he needs to, but generally, he spends his summers at the city pool. (Except days he has a baseball game!)
My husband and I stagger our working days. I'm off Mon, Tues, Wed and he's off Thur, Fri, Sat. I'm now working two jobs so he's more "hands on" at the moment then I am.
They will spend my days off at the stables this year, DD will compete in 5 or 6 lead rein shows, and DS will compete in one if we come across an under 3 category again - if not, he will just begrudgingly have to watch her. We will allow him to "warm up" the pony for a few minutes though in order to make him think he's taking part :)
I am a teacher, but after school during the school year I give 4 lessons a week. That doubles during the summer. My daughter is 11 and helps in my lessons, or does barn chores for our barn owner/trainer. On occasion she will get to stay home alone, but she spends most of her summer working with me. She helps work off board for her horse, and helps work off her week of horsemanship camp.