The Little Kathy engine is a small-scale, single-cylinder, oscillating steam engine often built by hobbyists and model enginee. It is a relatively simple design, making it a great project for learning about steam engines and Features of the Little Kathy Engine:1. Oscillating Cylinder: Itead of using a complex valve system, the cylinder itself pivots, controlling the steam flow.2. Compact Design: It's a miniature engine, typically used for demotration or model applicatio.3. Simple Mechanism: Suitable for beginne in steam engine cotruction.4. Made from Brass or Aluminum: Often built using materials that are easy to machine.