I second the vote for "noise-less" toys. In my experience, almost anything that is new to the child will keep him/her occupied for 15 minutes at a time. I have had a lot of success going to the dollar store and loading up on child-safe trinkets that I can pull out one at a time as necessary to keep the child occupied/interested. I've also found new board books to be helpful, too. Anything the child can put his/her hands on. But, I think the most important suggestion is that the toys themselves are quiet.