During a recent sort out, Stuart came across an old steam engine he had as a child, and thought the boys might find it interesting. So water was added to the water chamber, a fire was lit underneath, and we waited til a head of steam built up.
The look on Ethan's face was of open-mouthed wonder once the wheel started spinning as it really does shift! They all took turns blowing the whistle. We talked about steam engines, mining, trains, why it stops when there is no steam, etc. They all now want to take it into school to share with their class mates.