Mel's talking quickly

All morning, he's been super chatty. Carolina as usual, was very chatty on the walk to school. Usually he's quiet on the way home, but today, he was "wha dat?" about everything. Every sound and thing he could point at. 

I'm usually great at translating what he's saying but his sentences are longer and faster and I'm not catching everything. Case in point with this short conversation earlier:

Him: chewcheew owlbort

Me: (puzzled look)

Him: chewchew owlbort

Chew chew owl-bort

Me: Again but more slowly. 

Him: Chew-chew awl bort

Me: Oh! Choo Choo! All aboard!

And scene.