Using the principle of magnetic attraction, when the sound is working, the magnetic attraction ball moves with the music, draws on the aromatherapy sand table, draws the texture pattern, and the gradual change indicator light will also change with the music. The whole body adopts simple modeling lines, and the transparent cover prevents the aromatherapy sand from leaking out. You can also see the operation state of the magnetic attraction ball at a glance, and the aromatherapy sand can be replaced. The products designed by the university were redrawn some time ago. There were many contradictions in the previous design, and there was no time to modify them at this stage and send them out for entertainment.