Check out the famous puzzle game in its version Grinder pollinator.
This grinder pollinator consists of 4 parts removable.
In addition to its original design, this grinder has the other peculiarity of its system of opening/closing the “Quarter turn”.
In effect, then, he makes you screw or unscrew the other grinders to access your grass wither,
or the lower part pou retrieve the pollen, you will not be here that has to perform a quarter turn to open or close your grinder thanks to a clever system.