Vaszin was an early environmental idealist and really pushed the idea of electric powered trains, as safer and less polluting.
A young mechanical engineer by the name of Frank Williams joined the Dayton Fun House in the mid-1920s, and later so did his dad and his son.
After World War II the Fun House began attracting worldwide recognition, and supplying amusement parks elsewhere.
Their most popular and recognizable model was the "Century Flyer", supplied to various amusement parks and for children's rides.
In addition to building trains and components for amusement parks, NAD also built entire rides, including some unique roller coasters.