I had one of those when I was a kid, as well as a hoe-type vehicle, and a bucket excavator. They were all made of metal. My grandma kept them in her house when my brother and I outgrew them, and they were still in such good condition that I ended up giving them to my nephew last year. They were still in excellent condition.
It makes me a little mad now, because their Dad (my BIL) stores them outside, exposed to the elements.
These are the things: