This is very good and interesting Visual Basic Script Trick which let your computer speaks whatever you type. There is no requirement of any software. Just follow below simple steps.
First open Notepad and copy below codes
Dim message, sapi
message=InputBox("What do you want me to say?","COOL HACKING TRICKS")
Set sapi=CreateObject("sapi.spvoice")
sapi.Speak message
Now save the notepad file as talk.vbs
Now close the notepad file and open it again.
Done !!!