EL ALTO, Bolivia, Aug 3 (Reuters) - Erick Callejas may be just 10 years old - and a lot shorter than the other participants on the soccer pitch - but he has no qualms enforcing the rules as one of the few referees his age. "On Saturdays and Sundays I go out to referee with my little colleague, my son, Erick," Ramiro said. Callejas refereed his first match in a women's league after his dad signed him up for the job. "My dream is to referee the Bolivian Derby, to be a FIFA referee so I can go to the World Cup, America Cup, Liberators Cup and the Champions League," Callejas said. Reporting by Monica Machicao, Sergio Limachi, Santiago Limachi; Writing by Isabel Woodford; Editing by Lincoln FeastOur Standards: The Thomson Reuters Trust Principles.

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Persons: Erick Callejas, Callejas, Ramiro, Erick, Beimar Tancara, Tancara, Monica Machicao, Sergio Limachi, Santiago Limachi, Isabel Woodford, Lincoln Organizations: ALTO, La Paz, Bolivian Derby, FIFA, America Cup, Liberators, Champions League, Thomson Locations: Bolivia, El Alto, La