In one of life's little coincidences:
You had me thinking "Cookie Monster" (Snufy and The Count too ). Then I hit play, but I hear "Trolley's" bell music from Mr Rogers 
..thanks to my channel surfing Renter 
Bravo 
You need to gut a fat laptop shell next 
Maybe even retain the screen with a picture frame driver for a backdrop?
I just did 197 (?) laps , 14 scale miles, 20smph for 41 minutes on a 4.7v wireless landline battery (same as some old cells & cameras too) That motor used up 2 AA (non-alkaline) in twenty minutes.
A diode or three could knock the voltage down from 4.7 a touch and still give you more time. A high/low speed setting too if you wanted it too. (It shouldn't be hard to find a heavy pot. or light rheostat for that motor; but I'm thinking "on hand". (auto headlight &/or interior light dimmer ? )
Cheap general purpose regulation diodes eat more voltage; nice efficient ones eat less voltage Choose the diode amps higher compared to motor use to lower a diode's heat for it to be more touchable. (I imagine 2a would last "forever" and be a cool runner at that) )
You know this guy already covers up tight when he coughs or sneezes 
or he had a drailment and the town got leveled 
