An advertisement for Citroen sees a giant levitating one of these made out 
An advertisement for Citroen sees a giant levitating one of these made out of cars, and a large mural made of these objects is made to spell out "Hybrid" in a Honda Advertisement. In another advertisement, one of these is made to twist so fast as to burst and splatter its colors on a wall while a PS3 is visible in the background. Invented by an interior designer from Hungary, it has more difficult variants called the "Revenge" and "Professor." For 10 points, identify these objects, all of whose sides are made of the same color when it is solved.
An advertisement for Citroen sees a giant levitating one of these made out of cars, and a large mural made of these objects is made to spell out "Hybrid" in a Honda Advertisement.