Make a custom riddle with hot wheels

I'm fast and sleek, a tiny thrill.

On tracks I zip, with lightning skill.
With fiery wheels to mesmerize,
Through loops and twists, I hypnotize.

Kids adore me, collectors too,
In vibrant hues, my style shines through.
I'm not a car, but still I roll,
A tiny wonder to behold.

On four wheels, I'll zoom away,
Be it dirt, pavement, or a raceway.
But never can I leave the ground,
A gravity-bound joy, I'm renowned.

Sure! Here's a riddle for you:

I zoom and race, always on the go,
With cars so tiny, but full of glow.
Kids love to collect me, lined up in rows,
On tracks we fly, where does the fun flow?

What am I?