Wow - I have BTDT. I don't know how I made it - but it does get better. If you can at all swing it, see if you can get a sitter even for a few hours it is a sanity changer. It does not need to be a highly qualified nanny - just a 14 year old kid (cheaper) who can manage the glue gun situation while you keep the one year old from choking on stuff would work.
Option 2 - (yes I know it is bad to use the TV as a sitter - but dinner needs to get made and the laundry will not do itself) - signing time is a good option for this age.
We had a nature center near our house which was fairly good for both that age - they had a crawl area for the 1 year old which was just next to the toddler play area.
