baby Hammock
I used a "Nature's Nest" baby hammock with my first born, and he loved it. He was comfortable up until about 6 months or so then he wanted a bit more space. We found it great for travelling, and they also seem to help with colic, which my son suffered from. Some makers also claim that it's good for reducing the risk of SIDS. I'll be using it again for number two very soon.