Thai money has coins, too. 50 and 25 Satang coins are small and brass made. Five, ten and one Baht coins are also used in Thailand. Silver and brass are frequently used to make coins and there are marks to indicate it. Thailand Money is available in multi colored notes. The 50-Baht is blue, 20-Baht is green, 500-Baht is purple, 100-Baht is red, and 1,000-Baht is white and 10-Baht, though rare, is brown in color. As in July 2007, 45Baht of Thailand Money is almost equivalent to 1USD.
There are many ATMs in Bangkok and the other parts of Thailand. ATM system in Thailand is not reliable always. Sometimes, machines become inoperative. Depending solely on your card can be troublesome. While changing traveler's cheques, Banks are the best. AMEX traveler's cheques are the most accepted card. As the exchange rate is poor, it is unworthy taking 'Baht's in another country. As for using credit cards, Visa, Mastercard and AMEX are in the sequence that must use while dealing with Thailand Money. The currency exchange facility for Thailand Money is open for 24 hours.
The following link will provide more information about Thailand Money:

