I made use of a playpen when I wanted to sew. Now mind you it wasn't hours on end, but for half hour 45 minutes or so, I could sew. I set it up next to me, at the machine, no where near where child could grab anything, (especially iron cord) and got my fix that way.
After the play pen was no longer an option, In our family room, I moved the sofa out from the wall three feet, behind it out of reach from the back of the sofa, I set up the iron/board. My machine was set next to it, with a small cabinet between iron board and machine table. All this was in a line along the wall. A tall toy box blocked enterance into this area from one side of the sofa, and I sat sort of where you would put an end table on the other end. My kids learned that they couldn't go behind the sofa. Period, never. Not even if I was in there, they could come up to my back and I could stop sewing, and tend to them, but they could not cross that imaginary line. Even my daycare kids quickly learned that, that space was off limits to them. I still kept scissors and dangerous stuff up high on a peg board. Kids really do respond to rules, if it is done right.
THis set up got me through about 5 years of little kids. Only thing I couldnt' do back there was cut stuff out unless it was small. But for cutting I used the diningroom table. Had to cut when hubby was home, or nap time. If I chose to sew while the kids were around, I got them busy with something. Playdough on a big floor mat gave me a good hour. The kids could play on the floor the other side of the sofa, and I could happily sew on the other, watching them the whole time. It was a good set up for us.
Sandy Erickson
Just some ideas Sandy