All this food on these pages and somehow never got around to dessert.. :) Makes for some nice colorful pictures too. Many restaurants would have Thai desserts on the menu along with things like ice cream, usually under the general heading 'khong wan', or 'sweet stuff'. Most often it is ordered as 'ruam mit', literally meaning 'shared friends' which refers to having lots of different sweet bits together in one bowl. You can order it with just a clear sweet syrup and shaved ice, or with white sweet coconut milk added as well. You don't have to order ruam-mit style, at food styles like the one pictured here you can cherry-pick exactly what you want in it. While many of the items look very artificial, they're all actually made from natural ingredients.
This particular food stall is located at the Chang Phuak night food stall area, on Maneenopparat road along the city moat, just before you get to Chang Phuak Gate. One serving goes for 10 baht or so.