If you have the space, we had gotten our little guy a small ball pit, it's pretty much a small swimming pool with a dome net attached. You could also just use an actual small pool with higher sides. He loved jumping in, rolling around in all the balls and getting buried in them. But he also loved throwing them everywhere!
I don't know if you let your children watch videos - but there are some great new ones. My children always loved the Baby Einstein videos and they were only about 20-30 minutes long- perfect for getting a small project done without getting interrupted.
A video about 'baby signs' would be great, also. Then if you son picks up on some signs, he will be able to communicate more clearly with you.