Plutoscope 3A variant of the first Plutoscope (5) with three circles.
Plutoscope 4A variant of the first Plutoscope (5.1) with four circles.
Plutoscope 5Five intersecting circles arranged around a rounded pentagon in the center.
Pocket GeraniumA smaller version of Geranium with three circles in different distances.
Pocket TetrakiumFive intersecting circles rotatable in four steps with intersections deeper than usual.
Pop and TwistA 2D-puzzle with six axes of rotation and only three orbiting parts per axis.
ProcyonTwo intersecting circles rotatable in five steps of unequal angle.
Puzzler - AvengerRotate each half to scramble or return colours. The most difficult of the three versions.
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