What ever happened to the 10 cent mechanical ponies in front of stores?

When my son was 6 years old, he promised to be good inside the store, if he could ride the mechanical pony outside. This was in the early 70s. For a dime, it was worth it. Once on the pony and a dime was deposited, he once stated to me “daddy, I am going to ride this pony all the way to Texas”. I could not help but to laugh. Those were the good times we had with our children. Question: where did all those mechanical ponies go? Are any still around?