*****Making A Small Roller Coaster - A couple of questions (please answer ASAP)***** Hi I am going to make a small roller coaster and I had a couple of questions about it. 1) What materials are the best in making different parts of a roller coaster model? (The tracks, Loops, Base and ...) 2) Does the first hill have to have more hight than the other hills? 3) How is designing the roller coaster possible if I don't know the friction of the track? Fun Question) What theme do you prefer in a roller coaster? IF YOU KNOW THE ANSWER FOR ANY OF THESE QUESTIONS, PLEASE REPLY. IT'S GREATLY APPRECIATED. Thank You.