KaleidoscopeA moveable plunger intersecting with a rotating circle.
Knight spirit pillA cylinder with 4*8 tiles which can be moved in two completely different ways.
Kvadratura KrugaA puzzle from the soviet era. Its title means "Squaring the circle"
LoticaThe original Lotica without images on the pieces.
Lucky CloverEight plungers are used to move up to sixteen pieces. Three possible configurations.
Magic Disc24 colored half-cylinders in 2 layers, 6 columns, and 2 rings.