Once upon a time, there was a curious young boy named Alex. He always wondered how the steam engine worked. He decided to go to an inventor named James Watt to find out.

When Alex reached James Watt's house, he found the old inventor tinkering with a model steam engine. Alex couldn't contain his excitement and asked, 'How does the steam engine work?'

James Watt smiled and said, 'Let me explain it to you with an easy example.' He grabbed a teapot and a balloon. 'Imagine the teapot is a steam engine's boiler, and the balloon is a piston inside it.'

James Watt continued, 'When we heat the water inside the boiler, it turns into steam. The steam takes up more space, just like when you blow air into the balloon.'

James Watt pointed at the balloon and explained, 'The expanding steam pushes the piston, just like the balloon pushes the air out. This creates motion in the steam engine.'

Alex was fascinated by the explanation and asked, 'But how does it make the wheels turn?' James Watt smiled and showed Alex a drawing. 'The motion from the piston is transferred to the wheels using gears and rods, making them spin.'

James Watt even showed Alex the pattern of the engine's design, explaining how all the parts fit together to create the amazing steam power.

After the detailed explanation, Alex felt like he truly understood how the steam engine worked. He thanked James Watt for sharing his knowledge and left with a newfound excitement for inventing.