Judging by the style of wheels, it's an Asian-made tricycle, and not that old. They are more cheaply made and deteriorate rapidly. Garden art is the best use for one after it's had some years' use. I had a two-seater Asian tricycle for awhile. It was a very weak design with a bolted joint at the head mast/frame connection. Sometimes you'll see the two-seaters for sale and the frame has already started bending from a heavier rider.
The front fender on the other green one looks like another Murray.
Dave