Car battery and solar panels...
...or a hamster running around a wheel
Save the planet
If you plugged it into a van for 8 hours that van wouldn't be taking you home afterwards. A generator running for 8 hours is a whole load of energy and fuel pollution for nothing other than flinging a few cars around a track. The kids racing would breathe in so much rubbish, you'd have to take them hosital in your van afterwards.
Maplin Electronics for solar panels, OK?
Tesco for the hamster
...or a hamster running around a wheel
Save the planet

If you plugged it into a van for 8 hours that van wouldn't be taking you home afterwards. A generator running for 8 hours is a whole load of energy and fuel pollution for nothing other than flinging a few cars around a track. The kids racing would breathe in so much rubbish, you'd have to take them hosital in your van afterwards.
Maplin Electronics for solar panels, OK?
Tesco for the hamster