MICRO Retractable Cable Lock
My 9 year old was able to configure the lock's combination herself, and it rides around on the cross of her scooter's handlebars. A little worried that the thin cable may be vulnerable to a good set of wire cutters, but mitigate that by not leaving it locked up for long periods or in low traffic areas.
I bought this lock to be able to lock up both of my boy's scooters at school. It's very light, easy to use, and long enough that I can secure 2 scooters to a bike rack.
At last something that can secures scooters. It's light and easy to use. We leave it locked around the main pole of the scooter when not in use.
This lock is great & easy for my JK to use at school with her scooter!