Thanks guys. No ground needed, understood.
Grandson arrived last night and my goal was simply to see if it interested him, before unsnapping the track to make room for the guest airbed.
He was captivated. Mom helped him with the controller, and it seemed he understood the throttle makes the cars move and stop.
That's all the motivation I needed to plan an HO set for him for Xmas. I keep this track for myself
Now I'm free to make it bigger, more lanes, banks, etc.
At one point he tested a controller to see if it would substitute as a cell phone
New subject, if anybody plans to buy an airbed for guests, I am very pleased with the quality of this one from Walmart.
Mine is a queen for $70, very good value IMO. Air pump is an integral unit and whisper quiet. One slide switch "Inflate-Deflate-Off. Fills up in about a minute or less.
Doggone thing even has a headboard. My son, daughter-in-law, and child are not small people are they said it worked super. Highly recommended