The engine of this set has a switch next to the smokestack which Greenberg's Guide to Marx has incorrectly identified as being for a brass strip
choo choo strip. In fact, the switch is to engage a
sparkling mechanism on the front of the motor. These were not a good idea and did not last. The sparkling mechanism on a clockwork engine is
adorable and practical. On an electric engine the flint is not going to last past the first day. Little boys get tired of winding up a
clockwork train so the amount of playtime one sees is relatively small. Little boys will run an electric train in their sleep if allowed too!
A sparkling flint in an electric train is just not going to last. It is pretty cool though when you can get the pressure just right so the
engine will run and the sparkler will engage.