Review on Optical X Cube Dispersion Physics Decor by Carlos Barete

I bought these cubes in September to give my son for Christmas so I just wrapped the package without opening it. Unfortunately, one of the cubes broke off at a corner. I have tried to find out where to contact the seller but have not been able to. I hope you read this review and contact me for a possible one cube replacement. That issue aside, my son really likes how the cubes reflect the sunlight in his room.