Topic Wash: Yes wash goes well - only the red with the Quietschie must then always something brutal to be shaken and no longer squeals as easy as in the beginning. But that does nothing, then will be exciting!
So: The beautiful colors, the many structures (network, Knisterfolie, rubber, ...), the dice are long interesting. And then that is when the age in which they can be stacked - in other words, a well-designed investment!