This is a favorite photo of mine. It’s my nephew on a 1935 John Deere B. You’d assume he is unhappy because his mother left him or something… But in reality, he was unhappy because he wanted to be on the 1938 John Deere B with rubber tires that was next to the steel-wheeled tractor he was sitting on (which is what he is pointing at).  Once I put him on the other tractor he was very happy.