You are advised to bring at least $200 in NEW $100 bills per person. These bills must be nearly perfect, without folds or marks with a date of 2003 or newer. It is best to convert the U.S. dollars to Kenya shillings at the Nairobi airport. Your team leaders will advise you about where best to do this conversion. Visa or MasterCard are accepted in Nairobi and the large cities. There are ATM outlets in Nairobi. It is advisable to apply to obtain your U.S. cash at least two or three weeks before the departure date, as most banks do not keep perfect bills on hand for immediate purchase.