Clean room. Reply to your question: Those chrome wheel that I use for my Lego cars are from those Jada Toys cars. They were my little brother's and he broke them all, I salvaged couple of sets of wheels. And they fit perfectly.
while this isnt really a MOC,I still wanted to comment on this.well,you sure are lucky,you got youre own room,and it has hardword floors!I don't have my own room,(big family,small house)and have carpet floor.the advantege to having hard wood floor is that its smooth and not hard too......I lost myself there..see ya!