Up...Down...and Around

That's right. We're talking roller coaster. At Funderstanding Roller Coaster not only do you see the roller coaster but you design it. You create the height of the hills. You determine the mass of the coaster. All aspects of the design are yours. Does your roller coaster deliver thrills or does it run off the track and crash. Could be interesting for engineering or physics classes...or just for fun.