Anecdote: I'm not far from Paris, I was walking around a corner, dude on the footpath on a escooter runs right into me, luckily I am 188cm/100 kilos and he pretty much bounced off me, but a kid might have been less fortunate.

Paris is nice to cycle, cars can't typically go fast enough to be too much of a hinderance, better for bikes will be good tho, the bike lanes need some work