Ok so here is a brief story in how street carnival works.
Mind you that we're 1 week after the carnival holiday (the big holiday is gone), we're in Sao Paulo (traditionally not big on street carnival).
23Blocos de rua24
31I wish I was a fish32
It ran on Sunday March 5th at 9am and it went until 6pm. We were there at 10 with a couple of friends with their kid.