Once upon a time, mechanical elephants roamed up and down the boardwalks of beaches. Check out the clip below from a 1950s newsreel. The elephant, built by Frank Stuart was "Gasoline Powered with a 4 cylinder English Side Valve Ford engine. Top speed 27 MPH!"
I found the clip on the blog of Eastcliff Richard
who reports that, "Astonishingly Britain used to lead the world in the production of mechanical elephants. This one was later sold to the late, great, dearly-departed Peter Sellers as part of his eccentric collection of automobilia."
Some more videos of mechanical elephants can be found here