Sometimes I do. Although I'm a teacher so I get a lot of holidays and I just pay half rate and keep DS2 home with DS1 and I. But if I don't get a supply day I still sometimes send him so I can book appointments etc. without him. He usually goes from 9 - 2 on those days (and is only awake for 2 or so hours). Wouldn't bother me to send him though anyway and have a day to myself - I do enjoy his company when his big brother is at school and it's just the two of us. But it means being stuck at home during nap time and if I have things to do ill just send him. I've been known to just take him there while I do groceries too.