Hiya Janel, and welcome to the Disney Parks Moms Panel!
Purchasing Disney Gift Cards as you suggest is a great way to kick-start savings for a Walt Disney World vacation, and you are most certainly able to use the gift cards to purchase
Walt Disney World Theme Park Tickets. I have done this many times myself.
As you acquire each Disney Gift Card, I highly recommend that you register the gift card on the
Disney Gift Card website. To do so, you will need the account number and security code located on the back of the card. (Note you will first have to peel off the silver security tape to reveal the security code.)
Not only can you purchase gift cards from the Disney Gift Card website, but you can also register your gift cards once purchased, check remaining balances on each card, and even transfer funds between cards. Typically I tend to keep just one active card, and transfer funds from any newly acquired Disney Gift Card as soon as it is purchased. That way, I only have to keep track of one card, and when it is time to redeem my Disney Gift Cards, there is only one account number and security code required.
Janel, I hope this information was helpful. Should you have any other questions, please let us know. We are hEAR to help!
Magically Yours,
Trish