Roller Coaster Update 3

It was a busy week but I have found time to work on my rollercoaster project. I've painted a backdrop for it and started assembling more tracks. For the marble, I have a bunch of 2 centimeter steel ball bearings.

One problem I ran into so far is bending the track around corners and getting it to stay in place. Another one was figuring out how to start the roller coaster off. I wanted to have a small catapult "throw" the ball bearing onto the top of the track. After multiple attempts at making a functioning popsicle stick catapult, I decided it was was better to have it as a part of the decoration and not part of the ride.