Thanks! Yes the model stands 4 feet at the highest. I bought silicone moldes from a web-site called Hirstarts. I guess kids play a game where they create dungeons and castles and they use those molds to make whatever they want. I spend a lot of money on the molds. (but they can be used hundreds of times) The molds produce "Lego" size blocks, windows, doors, etc: I mixed plaster (from hobby-lobby) let it set up, then pour into the mold, let set for 5 mins, scrape top of mold smooth, let set for 20 mins, pop blocks out from mold, then bake in the oven at 250 degrees or air dry cure for 48 hours (before using) Then glue and with clear glue. You can also sand the blocks if you need to. It took FOREVER to make enough blocks! (So hence 5 months for the total project) I had NO model experience so this was all made from my imagination and pictures. The hardest part was the square towers in the back. It was fun and I have build Gringotts, Hagrids Huts and the Owlry and some Diagon Alley shops. (I'm running out of room now...lol) The pictures from start to finish are kind of cool, as you can see I was just winging it. Hope all you Harry Potter and creative types enjoy my project. Peace