How Far is a Block?

Veda: 'Dad, I think I could walk to school, how far is it?'

Dad: 'About 3 blocks...'

Veda: 'What's a block?'

Dad: 'Well, see those green signs, from one sign to the next, corner to corner, is one block.'

Veda: 'Is that like Red Rover?'

Dad: 'No, Red Rover is a game, a block is a distance, like a mile or a foot'

Veda: 'Oh, well, I think it would be easier if you described it like Red Rover'