Youcan buy a train ticket in Yangon to Kalaw, you are on one train to Thazi, andlots of people will get off and wait for the train to Taunggyi, which stops inKalaw. In my opinion it would be easier to do this than switch from the bus totrain. It takes about 24 hours and there's good snacks available from vendors.And booze. Another option is buying a Yangon-Taunggyi express bus ticket and have themdrop you in Kalaw.