Safe or right age to start training with bicycle in endurance?

[yukidomari]

If only there WERE grassy areas!... Then LA would be half as ugly..... Unfortunately, that's not possible here in Los Angeles. I'll have trouble finding biking routes on pavement much less grass or dirt... i don't think it's legal here to bike on the sidewalk. Bikes are considered vehicles that share the road with cars..(on a specially marked shoulder). Grass is in such short supply here that whenever our Csv sees any he feels an obligation to roll around in it..

Of course, he's been introduced to the bike and biking attachment and so, but I suppose I'll wait for any actual distance until later, since we just have concrete.

PS.. The first part applies to lawns as well...