Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Best I can see from the picture, you’ve got one of those with a heat activated solid state generator that powers the electric fan. It’s along the same idea as a piezo ignition, where heat (instead of pressure) generates electricity. 

The stirling type is completely non electric,  (and I just happen to have one on its way from China) has a bit of mechanical kit that looks a little like the guts of an internal combustion engine. It’s got pistons snd cylinders etc, and works off temperature differential. There will be a crankshaft and whirling clattery bits.