What a great idea! I wish all the best with this.
A great place for you to start building upon this idea is to consult with a SCORE counselor. They provide free advice, support and have many services to offer entrepreneurs.
http://www.score.org/index.html
Once you start with them, they will more than likely guide you to the SBA (small business administration) they also have a very helpful website.
http://www.sba.gov/
These are the two sites that most new business owners garner the most support and information from.
Good luck and best wishes in all you do.