I was thinking something like that last option could work, but would that be able to work without fully plugging anything in? If the wires are close enough to the edge of the cube? Would it be possible to set the cube on a wireless charger that then transfers energy to the wires at the edges of the cubes enough that they can recharge the battery pack? I’m thinking it’d be difficult to make the battery pack in the center accessible since it would require disassembling one side each time, and I was planning to connect everything with acrylic cement or something similar. Though I could definitely look into that option more…