Hi, Rebecca!
Disney's PhotoPass + is a wonderful way to save money on keepsake, professional quality photos from your upcoming trip to Walt Disney World. What a wonderful way to commemorate your daughter's accomplishment!
On WDW's website, the
PhotoPass + Presale Offer saves Guests even more money, by saving them an additional $50. This offer should be used at least 14 days prior to your arrival, as they'll mail you materials which can then be activated once inside a park. The two weeks, then, helps Disney ensure that this package can get to you prior to your departure from home.
I highly recommend PhotoPass + for a trip as monumental as this one, Rebecca, as you'll want to remember so many moments together, including photos from select attractions and Magic Shots, too. You're in for so much fun, and will surely wish that you had taken more photos, so purchasing this great deal is one way to encourage you to stop for a moment and let a professional WDW photographer capture those moments with all of you in the photo!
Send more questions as you plan this very special trip, Rebecca; we love to help!