the language on the sign up page:

"If you have enroled in Royal Orchid Plus before, please do not enrol once again but contact us at [email protected]

Note that children between 2 and 12 years of age are welcome to enrol in this program, click on Mstr. or Miss for Salutation."

seems to imply that the child must be 2 years old... but this is silly. I still have to pay for a seat for my 1 year old.

We have flown Thai a few times with our child who is under 2 and did not pay for a seat. We paid a small fee but there is no seat allocated, however each time the hostess moved the person in the seat next to us so we had the extra seat as there was empty seats elsewhere on the plane.