if you can get a proxy server there is currently a documentary on BBC iplayer about this very subject mentioning that there are vanilla flavoured tablets but I warn you it is hard going watching it because the female presenter's accent and pronunciation is awful.

Thailand's Drug Craze: Stacey Dooley Investigates -

http://www.bbc.co.uk/iplayer/episode/b038rw24/Thailands_Drug_Craze_Stacey_Dooley_Investigates/

FB hoax

This story is apocryphal.

Yaba is in such high demand that it is priced outrageously at 500 baht per tablet retail. There is always a scarcity, hence people risking smuggling/transporting tens of thousands or millions of tablets at a time.

Any report of an organized effort by illicit drug manufacturers and dealers to target children should be regarded with great skepticism first and foremost for the simple reason that children don't have money.

This particular story is particularly suspect because children have access to candy. As was pointed out in a comment above, candied methamphetamine would taste horrible. Where are children likely to spend the money that they do have? On expensive, bitter shit-candy that he or she has to buy from tweakers or some of the real candy that Thailand has in abundance?