I exchanged three travel passes: Kurashiki, Okayama Castle, and Okayama Ichibangai. I didn't exchange the Korakuen Garden pass because it was too hot to walk that day. For Kurashiki, remember to exchange it at the tourist information center to the right after exiting the station. For Okayama Castle, you can exchange it directly at the ticket counter and for ice cream on the first floor. For the Ichibangai pass, you need to exchange it at the information desk. Buying shoes at ABC and getting two 3,000 yen discounts at once is very cost-effective.