The passport card has one fee for US citizens when you apply for the first time, and another fee when you already have a passport. The adult and minor passport card fees are about the same. To be considered as an adult you must be 16 or older, and to be considered a minor, you must be 15 or less.
See Competitive Staff Registration-Passcard Validity Dates [.pdf]. Player membership/registration prices are based on the birth year, per the age chart, at the time the passcard .
The passport card cannot be used for international air travel. The passport card is Real ID compliant and can be used for domestic air travel. Please see Passport Fees for more information. Shipping Options If you're applying for a book, you can select 1-2 day delivery which costs an additional $16.