How can I join as a volunteer in Udayan,Kolkata?

Answer 1

1. The contact details for Udayan children's home are here.
http://www.udayan.org/

2. These organisations work with Udayan - they also should be able to advise you about volunteering.
a) City of Joy Aid (based in various countries)
contact: http://www.cityofjoyaid.org/donate.html
Udayan work: http://www.cityofjoyaid.org/impact_udayan.html
b) Calcutta Foundation
contact: http://www.calcuttafoundation.org/contactus.htm
Udayan work: http://www.calcuttafoundation.org/cgf.htm
c) St Joan of Arc School, England
contact: http://www.joa-udayan.co.uk/contact
Udayan work: http://www.joa-udayan.co.uk/india/62/udayan-and-steve-waugh

3. As a potential volunteer (for any programme) you should show much more initiative than you have here. You should be able to find this information out, for yourself, without running to Yahoo! Answers. After all, you are asking people, most of whom have no idea what Udayan is, or where Kolkata is. You didn't even state where you were located!