Thought I'd send you this one too...routed a 2 laner for my nephews (3 &
5). It's on 2 sheets of 3x3 mdf joined with piano hinges.  Used a cheap
Pyramid PS7 (13.8v constant) power supply then made the voltage
adjustable using the idea in this link
( so the
boys could learn as they go.
Please contact Tom with any comments or questions