"I ride tractor on"

"Dawson, do you wanna go with pappa on a tractor ride?", my dad asked Dawson when we were visiting them a few days ago.
Dawson gave no reply, because he didn't know what a tractor ride was. But after Pappa gave him said tractor ride, Dawson kept asking for another ride over and over and over. When Erin and I were in Chicago for a few days, leaving Dawson with Gammy and Pappa, he got his wish for lots of tractor rides.
But the way Dawson was asking to ride on the tractor was a bit odd and it took us a while to figure out what he was saying. The best we can decipher is that he was stating, "I ride tractor on." Since my dad would ask, "do you want to go on a tractor ride?", we assumed he was simply misplacing the on of the phrase "go on a tractor ride."
Whatever the reason, Dawson kept stating, "I ride tractor on", even as we drove by a John Deer dealership on our way home.

And in another funny turn of a phrase, Dawson was watching "Alvin and the Chipmonks" on they way home but he couldn't say the word chipmonk. The most common title he used was chickens, but the funniest title he used was monkey chips. That got a laugh out of Erin and me.