A rather neat kit - wooden track panels from I P Engineering. Designed for 32mm gauge, it's essentially a set track system for 16mm scale garden railways. Curves and straights are available, all laser cut from plywood.
Assembly jigs are included as part of the fret. You double them up and they provide a track gauge. My dad pinned the parts on to a fibreboard for even faster building. After trimming the "rail" ends with a few strokes of a sanding stick, the panels lock together ready to be used.