It's six o'clock on Sunday morning and there are fifteen tuk-tuks waiting outside the Grand Palace in Bangkok,thailand. A tuk tuk is a type of taxi with three wheels me driver sits at the front, and behind him is a seat for three passengers. Sometimes four passengers can fit into the tuk-tuk, but it is very uncomfortable They are called tuk tuks because of the funny sound of their small engines There are thousands of tuk tuks in Bangkok.