I like this idea using a 3D printer.
DIY Levitating Planter V2! – 3D Printed Version: In this Instructables I will walk you through the steps to make your very own Levitating Planter! After great feedback, I decided to make a second version of my levitating planter that is even simpler to make, and uses a 3D printed base. I also tr…
— Read on www.instructables.com/id/DIY-Levitating-Planter-V2-3D-Printed-Version/
Magnetic levitation module from eBay: