Our favorite quick pattern is 4-patches alternated with a focus fabric. You could use Sesame Street, Eric Carle or some other fun print for your squares, and just pull colors for your 4-patches from your print. Here is one we did this way:
http://www.quiltingboard.com/picture...t-t145663.html . Yellow Brick Road is another quick one. If you want a more traditional quilt, pinwheels, Jacob's Ladder, and the Simplified Carpenter Star all make good baby quilts.
Darren