People used to wonder what we can do with a rupee in our hand. Even the friendly neighbor hood alms seeker doesn't takes it. They demand minimum of Rs. 10/- now a days. The following link suggests certain things which you can do with a rupee with you. Don't know whether all of them are true or not but seems definitely worth trying!!
http://www.msn.com/en-in/money/perso...gnoutmd#page=1
http://www.msn.com/en-in/money/perso...gnoutmd#page=1