How about getting him a "Leapster"? Both my kids, at this age, loved theirs, and still do at their ages. It grows with the child and is educational.
Or, how about putting him in preschool, just part-time? Thereby, you will have some time to yourself to do what you need to do, with one less child there at home with you. When I had my 2nd child, my eldest child, my daughter, started preschool. Granted, she was 3 almost 4 years old at the time, but she LOVED it! It gave her socialization, and making "friends" and being educationally stimulated. She REALLY loved "her" time there and looked forward to it.
Or, what some Moms do, is have a part-time "babysitter" IN their home. Thereby, YOU can do your "work" and what have you. That is another alternative. My friend did that, since she works at home, and this option REALLY worked for her, and her child.
At this age of 2 years old, they really benefit from other sources of "socialization" and "educational" formats too. They are budding in changing development... that a younger sibling can't always fulfill in them. Its normal.
All the best,
Susan