What was first released, Kolejka or KerPlunk?
KerPlunk (game) KerPlunk is a children's game first marketed by the Ideal Toy Company in 1967. The game consists of a transparent plastic tube, plastic rods called "straws" (normally numbering 26 to 30 in total and of various colours – yellow and red predominantly) and several dozen marbles. The base contains four separate numbered trays and the straws are passed through holes in the middle of the tube to form a lattice. The marbles are then placed in the top of the tube and held in place by the lattice. The onomatopoeic name of the game derives from the sound of the marbles tumbling to the base of the tube during play.
Proserpin (Kraus) Proserpin is a Swedish-language opera by Joseph Martin Kraus to a libretto by the poet Johan Henrik Kellgren following a plot drafted by Gustav III himself from Philippe Quinault's Proserpine. The opera was premiered at Ulriksdal Palace on 6 June 1781. The opera was revived at the Drottningholm Theatre in 1981 The opera was performed with a new German libretto at the Schwetzingen Festival in 2006.