Valerios Stais
Valerios Stais is someone who made a cool toy called a steam engine. The steam engine is like a little machine that can move by itself if you give it energy from hot steam. It is like a little train that you can play with.
Valerios Stais made this toy a long time ago, when he was a grown-up. He was really interested in science and machines and liked to invent things. He was from Greece, which is a country far away from ours.
Stais’ steam engine worked by using hot steam to push a little rod back and forth. This movement made the engine move too! It was really amazing that something could move without needing a person to push it.
Even though Stais made his steam engine almost 200 years ago, people still think it's really amazing today. His steam engine is a very important invention, because it helped us understand how machines work and how we can use them to make our lives easier.
Valerios Stais made this toy a long time ago, when he was a grown-up. He was really interested in science and machines and liked to invent things. He was from Greece, which is a country far away from ours.
Stais’ steam engine worked by using hot steam to push a little rod back and forth. This movement made the engine move too! It was really amazing that something could move without needing a person to push it.
Even though Stais made his steam engine almost 200 years ago, people still think it's really amazing today. His steam engine is a very important invention, because it helped us understand how machines work and how we can use them to make our lives easier.