Hmmmmm where to start...The lights starting at the top were made from small light bulbs from the hardware store, and the base is two different sized plastic tubes. The very bottom of the lamps are those eletrical wire twists. As for the Balsa-foam to get it I had to order it on-line and it cost about 5$ for a 10" long X 10"high X 1" thick sheet. I just did a google search for "balsa foam" and now I see there are more than one guy selling it, it's about time...The foam is very light but unforgiveing, you can not make a mistake on it as it is unrepairable. It takes any acrylic paint and Elmers white glue holds it just fine. For large building that would weigh a ton made out of plaster the balsa-foam is great. But for little one story building it just costs to much, it's easier to use plaster. One more thing I cheated when building this dio...At the time I was working at a hobbie shop and had complete access to all the wood, styrene, metal and plastic sheets and tubes. But as a result I brought home more supplies than money. I guess what i'm saying is you need every conceivable piece of styrene and balsa wood one can find, because that made it very very easy to scratch build. Oops i'm rambling, sorry.