Klackers - These are two acrylic balls attached to a string with a handle or loop at the top. Basically, kids would begin flinging these things in the air until each ball would Klack each other. Keep in mind that the balls are fairly large (just smaller than a tennis ball) and hard as a rock (one that I had in the US). I remember classmates with bruises and broken fingers. Oh the fun?!
Also on these boards
Pink Lamby Love Vintage Squeaky Toy 1950's by ProfessorWoodruff