Great place for shopping. In the daytime, MBK (lots of stuff, cheap). Or Siam Discover, Siam Center and Siam Paragon for brandname (higher prices). In the afternoon & evening the area opposite MBK on the street for trendy fashion at low prices!
Siam Square has something to offer for every taste, whether you like expensive brand names (Siam Discover, Siam Center & Siam Paragon), cheap, fake copies of expensive brandnames (MBK) or trendy fashion at low prices by lesser known labels (in the evening, the area opposite MBK on the street market)