I am looking for a source for miniature boats to put in my HO layout, any suggestions?

I have in my bag of goodies different building, lights and a (3) light signal with (1) red,(1) yellow,(1) green light. There is a switch that came with it.
How do I wire this up to work? I would like to put it on a micro limit switch, any drawings or suggestions on this?

I have a Buchmann truetrack layout on the table. My problem(s) are:

1). I wish to add lights at all of my switches and at the control station. I have read a little about the Atlas Snap-Relay. I am having problems wiring this up, any help.

2). With the Buchmann trunouts, can the Atlas Snap-Relay work. How is this done.

3). On the Bachmann turnouts, the Atlas Snap-Relay says to wire in the frog. There is not one. Need help.