Thanks. Solenoid engines really do operate very much like steam engines but on batteries instead of steam, and switches take the place of valves to regulate the flow of power. They make nice, easy and clean desk models. Just flick the switch, and away it goes. No, I didn't make the stove; it's from another collection used to complete a diorama of wood splitting and ax honeing featuring the Treadle Wheel Grinder. Ralph