To rule “Calvinball” add subrule “Stealing”:

Any Child acting for themselves or on behalf of an Imaginary Friend on their own team may attempt to gain possession of the Ball from the current owner by making a Story Post titled “I make a steal attempt.” (or “X makes a steal attempt.” if on behalf of an Imaginary Friend where X is the name of that Imaginary Friend) and roll DICE5 to determine the outcome. On 1, the attempt is successful and the Child gains 2 Trouble. On 2 the attempt fails, the Child gains 1 Trouble, and the Ball is dropped. On 3, 4, and 5, the attempt fails, and the Child gains 1 Trouble.

Only one steal attempt may be made per change of Ball ownership.