Funny enough, it feels less like i'm pushing a toy with wheels and more like I'm pushing a cardboard box. There's a lot of drag with the floor. By rolling I meant the rolling of the wheels.
I think it would be fun to design around how fun car physics can be, with seeing the car roll down slopes, using the rubber-band to slingshot through ramps or trying to corner fast without tumbling over. There's inherent game-feel in how wheeled vehicles control, even without any motors (think soapbox racing!)