"American Christmas" for the Christmas ADVENTure 2015

This is my first attempt at an interactive... well, I guess you could call it a sculpture.
But I thought it could be a nice thing for the ADVENTure 2015.

And yes, I know it looks and works less than perfect, but you've gotta start somewhere.

Press the button to send a cart out onto the tracks.
It comes with four carts preinstalled, but since the save is in creative mode,
you can easily add more carts, replace the already existant ones and, well... break the effect - even more than it is already.

The idea behind it stems from the typical christmas picture, where there's a toy train going around the christmas tree.
Maybe the Christmas Painterly Pack (or a similiarly themed texture pack) makes this better...