Mine is still in transit (hopefully it will be here by Wednesday).
How exactly are these put together? I assume there is a 3x3 cube inside with magnets on each face. The outer acrylic pieces also have magnets and just kind of stick on, right?
If this is the case... the 3" white cubes are too big? We'd be looking for a light cube that's 2.5"x2.5", and 6 rubber bumpers that are .25" tall.
I believe these are self adhesive rubber bumpers commonly used for glass cabinets. Here are some, but I think they're too big. Either that or the Cubico cubes are too small.
Duraco Bumpers Cone | Essentra Specialty Tapes