I decided a simple 0-4-0 shunter body would suit the bill and so I built a freelance one from 2mm MDF. Other items included pipe and washers for the chimney, body filler dome and used sparklers for handrails. The smokebox was a cap from a bottle of Merlot after drinking. Mmmm!
The little engine has a fair turn of speed and will do just over a complete lap of my 25 yard circuit. The grandchildren think it's great

Old Blind Pugh