From Ludocity
Designer: Adam Skory, Adam Nelson
Year: unknown
Players: 5
Stuff required: A kickball. A trampoline. Cones for marking boundaries.
Crew required: None
Preparation: Five minutes.
Time required: 20-40 minutes per game.
Place required: Any open space with 20 feet of clearance on all sides. Indoors and outdoors work equally well.
Activities: New sport
This is a playable game - it's finished, tested and ready to play.
This game is made available under an Attribution-Noncommercial Creative Commons licence. (What does this mean?)

History and Influences

Monkey Ball was created by Adam Skory, Adam Nelson, and other members of Obscure Games Pittsburgh in November 2009. It was refined in February 2010 by other members of Obscure Games Pittsburgh. It is influenced by Monkey in the Middle, or Keep-Away.


A kickball/playground ball or volleyball, a mini-trampoline, and cones, chalk, or tape for marking boundaries.

Playing Space

The trampoline is surrounded by a ring about four feet wide, creating a donut shape around the trampoline, in which the goalie stands. There is no outer boundary to the field. When played indoors on a basketball court,the trampoline is set in the middle of the center circle, which forms the ring. If played outdoors on asphalt or concrete, the trampoline can be replaced by a circle drawn on the ground.

Number of Players

This game is played with an odd number of players. 5 is the minimum, and the best. Teams consist of two players, but players are constantly switching teams.

Gameplay and Rules

A goalie is selected. The remaining players divide into two teams of two. The goalie starts the game by bouncing the ball off of the trampoline and out of the ring. Players may dribble and pass the ball to move around the goal. Teams score by bouncing the ball off of the trampoline, and causing it to land outside of the center circle before being caught by the goalie or the opposing team. If the goalie catches the ball within the circle, he or she may spike the ball off of the trampoline and, if it lands uncaught outside of the circle, score a point.


  1. Players start the game spread evenly around the ring. The ball is kicked-off by the goalie in any direction it chooses.
  2. Players may not run with the ball. To move, a player must dribble the ball or pass. Double-dribbling is not allowed, and once a player stops moving, they must pass or shoot the ball.
  3. The goalie may not leave the ring. Players may not enter the ring. If a player crosses the ring on a scoring attempt, the ball is turned over and no score is made.
  4. The goalie may not hold the ball for longer than three seconds. If the goalie scores a point, teams switch members.
  5. A player who scores a goal receives two points, and their teammate receives one point (for the assist). The scoring player then changes positions with the goalie. If the goalie scores, he receives one point and there is no change in position.
  6. Players keep their own individual score. A game is played until one player scores 11 points.