I explored Home Depot today furthering my research on all the possible ways to simulate stucco for the little doll house. Right now it looks like I'll be using Spackle, as Trisha suggested. It was the cheapest alternative. Some of the other ideas would have been just as effective, but involved expensive purchases, or came in containers that were far too large for my purpose. I really loved Paula's idea of the stone effect paint, but it only came in gallon containers.
Before I go spackling the whole house I'll do some testing seeing if I like the results.