Stemnex Construction Set – Steam Engine is a toy primarily suitable for boys. By building the steam engine, children will learn how such a steam engine actually works. They will be thrilled to assemble a mechanical steam engine toy themselves. Moreover, it will become an ornament in any boy’s room. The toy creates steam and whistles. The construction set teaches children how a steam engine works. Children can assemble a mechanical toy in a fun way. It sparks interest in mechanical and electronic devices among little tinkerers. The steam engine emits steam and whistles.