An experience not to be missed when travelling to Bangkok is the weekend market. Here you will be able to purchase those treasures and momentos that would cost 2 or 3 tims as much in stores in the city. You will find everything from antiques to angelfish, clothing to cutlery, rugs to reptiles (I'd give those a pass). The market is enclosed, and encompasses a few acres. It is hot & crowded, and not for the claustrophobic, but a lot of fun nonetheless. Using the JW Marriott in Bangkok as your reference point, take the skytrain all the way to the end station of Chit Loam, fare about US 1.25.
Some tips: 1) Bargain, bargain, bargain! Don't pay first price. Most all vendors speak enough English to negotiate 2) If you don't have local cell phones, arrange a meeting place before you split up; its easy to get seperated and lost 3) have some spare change for the toilet attendants, and BYO TP 4) You'll get hot, so dress for it. You can purchase cool drinks at many points in the market