Project Finding "Nory" (Dory + Nemo) build/custom

Now my goal is to somehow either build a base and mount this on with a switch, or what I would love to do is incorporate this into a "stop and go" style track or have pressure activated switches so when the train passes it activates a sound or action..

So, any thoughts on what to do? Please share. Thanks.

Have you thought about using this as a base?: http://www.aliexpress.com/item/D500-Free...81289.html

These bridges have been brought up on BPT before, and as they have a train activated switch you could modify or repaint them for your purposes, just wiring the switch to your project instead of the bridges board.