It is wonderful! For my daughter's friend's first born son I made an NFL quilt with fabric from all the teams on one side and the Chargers on the other side since he was born in September. Her other son was born in the spring so I made him a MLB quilt on one side (had fabric from all the teams except DC) and the Padres on the other side.
We have to start them out early - or they may become soccer fans. (Only kidding we are into all sports in this house.)