Question About Children's Bike Brakes

[Cycleops]

I don’t know the rubber conditioner you speak of but it shouldn’t need anything like that, just proper adjustment with good quality pads.
The rear V brake should be quite effective, the front less so. both have to go through what I think is called a gyro to allow the bars to be spun around which rather limits their effectiveness.

 

[Crevice]

both have to go through what I think is called a gyro to allow the bars to be spun around which rather limits their effectiveness.

What do you mean by this? Please explain

 

[Cycleops]

It’s a system to allow you to spin the bars around. You'll find it between the top of the headstock and the handlebars clamp. Here’s a video:

View: https://youtu.be/zC9V6tbWkc4