This is so awesome. A kid-sized BMW 507, custom-made in 1956 for use by the sons of a new 507 owner "on the one mile private drive leading to their estate in Suffolk," it currently runs on petrol, but could probably be easily converted to gas.
Let that steep for a few minutes, like a fragrant tea ball, before you decide to comment on it.
Whoops, missed it: Sept. 21, 2001, Lot 16: BMW 507 Childs petrol powered car, hammer value, £1,800 [brightwells.com via dt classic car guru dt]
the 1960 pedal plane in the Nov. 30 auction is a poor substitute [brightwells.com]