This is a finger-surf-board. Be prepare to ride the air in your car trips
Printed in two parts, you can glue earch other.
On top of the surface you can cuout a piece of rough paper, this will help your fingers not to slide.
In the hole you can tie any thread or fishing wire. then you tie that yo your finger so it does not fall when riding.
This works well with PLA but be carefull with the heat, it can deform if you leave it in your car.