Coin Toss:
Coin flipping, coin tossing, or head or tail is the practice of throwing a coin in the air and checking which side is showing when it lands, in order to choose between two alternatives, heads or tails.

Ludo Dice:
Ludo is often played with two dice, and rolling 1 on a die also allows a token to enter active play. Thus if a player rolls a 1 and a 6, they may get a token out and move it six steps.

Chess Clock:
Chess clocks are used in chess and other two-player games where the players move in turn. The purpose is to keep track of the total time each player takes for their own moves, and ensure that neither player overly delays the game.

Spin a bottle:
Traditional spin the bottle is to rotate the bottle with your finger and watch the bottle spin until it stops.