I am about to make a small JP visitors Centre! I made a patty for the large rotunda(no less than 8 cm lomg) and it doesn't look good! I am using the DAS clay you heard about in the other thread. The roof would be made out of toothpicks and I am planning on moulding the rest.
UPDATE! I am making a small JP diorama based on the first movie. I think I can do all of it except the dinosaurs. They'll be a bit tricky because of the size. Anyway, here is a picture of my progress: The photo includes: the main gate, the patty/visitors' center, the other two rotundas, a landing pad, and the ramp.