As long as you only want them to hover over a magnet...

Assuming the lift is there or the magnets are strong enough, it would be plausible to have an electromagnetic hover skate park where you could pay by the hour, and possibly even future X-game like events where the boards and riders could move in any direction they can get acceleration in.

Well that would be very, very cool.

I believe I saw a video of a hoverboard that worked over a carefully constructed magnetic skatepark...

https://www.youtube.com/watch?v=7KtzyZKSuls

I wonder how big of a superconductor you'd need to use Earth's magnetic field.

I want them to have enough current passing through them in a rod shape that it will run the current against the Earth's magnetic field to cause vertical movement.

This gave me a giggle to think about - mind expanding on what you’re thinking of using Thai scenario for?

The GP wants to lock the skateboard on the East/West direction, of course.

When we discover if gravitons exist or not and how to produce/manipulate them so that we can negate the effect of gravity on an object.