I bought streamers for my kids bikes:
https://www.pushys.com.au/bikecorp-handlebar-streamers-shiny-purple.html
How do I attach them? I was told I just need to push them through the holes on the sides of handlebars but they seem to be too narrow for this. Pictures attached:
Do I need to make the white plastic things thinner? Do I need to open or widen the hole on the handlebars somehow?