Any quilt can be a baby quilt if you make it small. I think bow tie blocks are fast and easy. They can be made any size you want and look pretty set with alternating blank blocks.
Here is an example of a quilt.
http://www.modabakeshop.com/2009/02/...tie-quilt.html
Here is a link to several sizes of bow ties.
http://quilting.about.com/od/blockof..._tie_quilt.htm