I think kids can look chavvy, Nike tracksuits with clunky Nike airs on their 3 month old... Gold bracelets on theirs toddlers... Ear piercings on boy toddlers with massive diamonds in. I see all of those things around here and non of them would be comfy either. Just the joggers won't make a kid look chavvy but I still prefer to put him in jeans or chinos as I feel they are too casual and I wouldn't wear them out.