Poble Espanyol has a small square. You can always find entertainers there, and both times I've been there, preschool children were singing on the steps of a building. They're sweet happy faces as they sang were enjoyable. I also really enjoyed walking through the village, the variety of architectural styles is a smooth transition of interesting buildings. The cobble stoned narrow streets are narrow and curved, giving a sense of old world charm.
There is a small fee to enter the village. From there, you spend only what you want. It is hard to stop from purchasing some souveniers or art work, but not impossible, and there are always some affordable ones.