Interesting Thai food and drinks you should try. If you'd rather not, check out regular Thai Street Food.
Anchan Flower (ดอกอัญขัญ)
The Anchan or Butterfly Pea flower grows everywhere in Thailand and because it's blue it's used to colour Thai drinks and desserts. The flower is also eaten raw, serving as one of the vegetables of a meal. A bit of a strange idea, but it tastes well and the flower is supposed to prevent a whole series of health problems like poor memory and stress-related illnesses.