First of all because Thailand is an amazing country, so it's worth your attention.
Secondly the quality of the coins (and stamps and banknotes) is high. Nice designs, good minting quality.
And last but not least, collecting Thai coins offers as much variation as collecting 2-euro coins, which they resemble to.
As an introduction, a small summary on the coins, currently in use in Thailand.
The coins currently in use in Thailand are : 50 satang, 1, 2, 5, and 10 baht.
Notes start at 20 baht.
There is also a 25 satang-coin, that is rarely used for actual payments. You might get it in a 7/11 shop, or it is also seen in the many temples in the country.
However, officially, there are more coins issued each year.
The full set is : 1, 5, 10, 25 and 50 satang, 1, 2, 5, 10 and 20 baht. Only in official year sets.
In 1996, (BE 2539) a special set of all coins were minted. This at the occasion of the 50th anniversary of the Reign of His Royal Higness Kind Rama IX (King Bhumipol Adulyadej).
The set contains all current coins.
The coins of 1, 2 and 5 satang are minted in aluminum (you won't find them ever in your change)
They are gold coloured, 25 satang is in brass, 50 satang in aluminium-bronze.
The 10 baht coin is bi-metallic, and has a brass centre.
The 20 baht coin is also rare.
This special commemorative set is easy to recognise since they all bare the national arms (two elephants, and royal emblem and standards.
|national arms on the cover of the set|
|national arms on the commemorative coins|
|full set 1 satang to 20 baht|
|full set - back|
You will encounter these coins still in your change, (except for the smaller satang coins and the 20 baht coin).