At eleven and twelve most riders are close to their adult height, so a scooter bought now is one they can keep rather than grow out of. This is the point where spending more actually returns something.
The Viral Kaos at $179.99 is rated from age ten and is the all-rounder here, for park, street and everything between. The Origin 500 at $219.99 sits above it in the range.
A budget complete is not unsafe at this age, it simply wears out sooner. A rider repeating the same trick fifty times an afternoon will find the weak part of a cheap build within a season.
The Bounce Trampoline Pro Scooter at $69.99 is made for a trampoline mat rather than the street.