There's no problem with 2-year olds and sewing space. Just have to put a gate/railing, whatever, between the two areas. Think of it as making two play areas separated with a barrier - your play area and his. I had a friend once with a couple of toddlers who loved to do handwork. She solved the problem by buying a large playpen - not for the kids, they could play all over the room - she was in the playpen with her pins, needles, threads, etc. Kids couldn't get to the items but had full access to mom.