Hi Peggy,
I answered a similar question this morning. I'll share some of that answer here and then give you specific places by park.
Snack possibilities are almost endless. The item has to be single serving
and must cost less than $4.00. Eligible items will be clearly marked
with a purple and white icon, but you are welcome to ask the Cast Member
if a particular item is on the plan.
Here is my other answer with some specifics.
Favorite places by park to get a snack:
Magic Kingdom: Aloha Isle (Dole Whip), Main Street Bakery and Main Street Confectionery.
Epcot: If you are a fan of caramel, be sure to stop by Karamell-Kuche in the
Germany Pavilion. You can use your snack credits there. It
smells heavenly and tastes even better. Also Boulangerie Patisserie in France and Kringla in Norway are great.
Animal Kingdom: Kusafiri Coffee Shop & Bakery
Hollywood Studios: Starring Rolls is great. My all time favorite at the Studios is the Carrot Cake Cookie at Writer's Stop. It is unbelievably good!
Have a magical vacation,
Kaylene