Tonight I broke the front brake on my daughter's bike after promising to fix her brakes Does anyone know what this nut is called? I could maybe fix it if I got another. I think I need to bite the bullet and buy her a new one. However, at £350 for an Islabike, I said to my wife I'd need to keep it in my security enhanced garage and she wouldn't be able to take it out whenever she felt like it. So what's the point in that? she asked. My daughter likes to take it out, ride about the street, dump it back in garden and go in and watch TV etc. She will be 7 in a month. Saw a £100 20" wheeled bike on Decathlon at 11.6kg but felt like the worst father on earth for depriving her of a super duper light one. Looked at Islabike at £350 but honestly can't see how we'd keep it safe/not wrecked while at the same time allowing her to continue a childhood where she gets to experience fun things instead of obsessing about keeping things neat and tidy. So £100 11.6kg bike she can throw about like children do or £350 8kg one that is honestly cry every time she bumped down a kerb?!