95% cardboard, 3% popsickle sticks, and 2% glue. I posted somewhere else that I have about $8 into the construction of the building and about $50 into painting it. But the last coat of paint I put on it helped a lot. It took it from a sandy looking structure to something that almost really looks like it is made out of rock. I am tempted to put out another $10 for another can of it to finish it off. Thanks for the positive feedback.