Hi April,
Disney's Dining Plan is a great way to pre-pay for your meals while you are on vacation at the Walt Disney World Resorts.
Your dining credits are available during your entire length of stay. Each day you are on vacation, you get a set number of credits. However, you have the total amount of credits to be used through out your stay in any combination.
For example, if you are on the basic Dining Plan, you get one quick service meal, one table service meal and one snack a day. If you are going for five days, you would have five of each of these to use during the entire course of your vacation. You can use them all on one day if you wanted. The choice is up to you.
Each time you use a credit, you will receive a receipt with the balance. Most often guests end up with snack credits leftover. The best way to use the snack credits is to buy treats for your trip home.
Wishing you a magical vacation!
Beth