You cannot do it yourself Lynne, but if you contact the Team they may be able to do it for you. Send in Feedback using the Contact Us link in the lower right corner under Company and tell them how many credits you want. They will be converted at the Kiosk price.

You can buy credits directly from PBS in teh kiosk or from other members in teh book bazaar.

You can't use PBS money to buy directly from other members or the Kiosk, I guess that is what I thought you were referring to. You can use your own money, PayPal, and sometimes Amazon gift cards to buy from other members in the Bazaar and the Kiosk takes PayPal and Credit Cards. I think you can also get an address when ordering from the Kiosk that will let you buy with a money order or check.