Conkers is a game traditionally played by children in Britain, Ireland and some former British colonies using the seeds of horse-chestnut trees – the name conker is also applied to the seed and to the tree itself. The game is played by two players, each with a conker threaded onto a piece of string: they take turns to strike each other's conker until one breaks.
- A hole is drilled in a large, hard conker using a nail, gimlet, or small screwdriver. A piece of string is threaded through it about 25 cm (10 inches) long (often a shoelace is used). A large knot at one or both ends of the string secures the conker.