A unique idea. Only problem is the lawyers would be all over it. Nitrogen burns are nothing to fool with. Also the availability of liquid nitrogen would be a problem. I’d be hesitant handling liquid nitrogen without the proper safety gear, i.e. gloves, apron. etc., let alone letting a child do it.
I don’t unnerstan that guy. Where’s the three rails?
wyomingscout
They could just paint or pinstripe where the 3 rails normally are.