Lakeside Toys first introduced Barrel of Monkeys in 1966. It only took seconds to learn, but the challenge could keep players hooked for hours.
Inside that plastic barrel were twelve little plastic monkeys, their little arms and hands extended so they could easily hook onto each other.
The game began with the players emptying the monkeys out of the barrel and into a pile on the floor or a table. The objective was to connect all twelve of the monkeys by looping their little arms into one long simian string.
Though it has been known to drive some players bananas (sorry), Barrel of Monkeys has remained popular through the years and can still be found at toy stores today, currently made by Milton Bradley.