Oh my. I've been there too. In fact, it was the reason I couldn't work out at home anymore and joined a gym with childcare. But, sometimes my workouts would be interrupted just as you described.

Sorry.
It is a tough age and sometimes a frustrating period of time in our lives as mothers. Even when my youngest did behave himself I felt so much GUILT over having him in there for an hour and half it was insane.
Hang in there. It will eventually get better. Maybe it was because they were the only two in the child care room at the time...Hopefully you will have some very satisfying and uninterrupted workouts ahead of you.
Don't know if it's an option, but when I knew there would be issues or interruptions to my workout ahead of time, I would go to the gym at 5:30am, got that workout in UNINTERRUPTED by ANYONE...(other gym members too) and returned home by 7:00am before DH left for work. Just and idea. (Course on those days before and after I had to be in bed by 8:00pm
