You can buy some Thai jewelry, there are wooden elephants, special earrings, bracelets and so on

You can also buy shawls, sarongs, printed with Thai clothes, the market have these, not expensive, twenty or thirty yuan.

Cosmetics can also be bought, the airport duty-free stores have a lot.

Thai special Bangkok bag, called NaRanYa (NaRanYa), is a very good choice, a lot of Chinese people like, 50 yuan or so, there are also very cheap.

You can also send a few Thai dollars.