How do I change my voice after recording it?

I want to change my voice into that of a baby after recording it how can I do it??

Tell me anything, but if you know how to do that in sony sound forge it would be better

Thanks.How do I change my voice after recording it?
Audacity is your best option. Free, easy to understand and the effects are great.

This is a link to the download. http://audacity.sourceforge.net/download/ Hope this helps :)How do I change my voice after recording it?
search for a free software to do that