Welcome to planDisney, Tammy! I am so glad you found us here to ask your question.
How generous that you are wanting to assist your son’s family with a visit to Walt Disney World! When making a Walt Disney Resort reservation, a $200 deposit is required to lock in the reservation. Then, at any time, payments can be made online, and in any amount. So, to answer your question, YES, you can purchase a Disney gift card to help with paying off the vacation package.
You can purchase Disney Gift Cards at a local warehouse club store (with maybe a small discount), or at the Disney Gift Card website. You can combine these cards on the
Disney Gift Card website (up to $1000 per card), and then gift them to your son to pay for some of his vacation.
I hope this helps with your planning your generous gift! Please come back to planDisney with other questions that you might have about Walt Disney World.
Happy Planning,
Tracy