Hi Rebecca,
I'm so excited for you to experience
Disney's Art of Animation Resort in just a couple of months! I know you're going to absolutely love it!
There are a couple great options for purchasing grocery and food items at Art of Animation. First, the Ink & Paint Shop is the gift shop at the hotel that offers many of the usual staples, such as milk, bread and cereal. You can also stop by Landscape of Flavors, the wonderful food court, for breakfast, lunch and dinner daily. You'll also find some "grab-and-go" items for purchase there, like yogurt, sandwiches, fresh fruit and bottled drinks, which could easily be purchased in advance and kept in your room for an easy meal or snack.
If you're looking for more than the basics, you might consider placing an order with a company that delivers groceries right to your hotel, such as Garden Grocer. I've used the service several times myself and have been very happy with it.
Wishing you a most magical vacation, Rebecca! Please visit us here on the Disney Parks Moms Panel again if we can help in any other way.
Beth