As the box explains:
"Ker Plunk is the game where you take your pick and pull a stick. If all the marbles fall, you lose it all! You're only sunk if they go...Ker Plunk!"
This classic game of skill can be learned in seconds, but it offers a fun test of hand-eye coordination that is challenging to people of all ages and skill levels. As a result, Ker Plunk was a popular favorite among skill-game enthusiasts throughout the 1960s and '70s.
The game consists of a clear plastic tube, 30 thin sticks, and 32 marbles. Play begins with the players inserting the sticks through the tube and then pouring the marbles into the top of the tube. The sticks act as a web that block the marbles at the top of the tube. At this point, the players begin to carefully remove the sticks one by one. The goal is to get the stick out without making any of the marbles sitting on top fall through. If any do so, the player who made them do so collects them. Once the last marble has fallen, players count their collected marbles, and the player with the fewest wins the game.
Ker Plunk was first published by the Ideal Toy Company in 1967, then later by Mattel and finally by Tyco in 1991. Mattel also published a variant of this game called “Super Ker Plunk!”