My twin puppies

Two puppies born the same day are brought home to a boy who names them Bubbles and Troubles; they receive collars and are trained to perform tricks like jumping through hoops, begging, walking in step, singing, and playing dead. When the boy stages a backyard circus to raise money for a disabled neighbor, the puppies go missing but are discovered hiding in the family car; the show resumes to great delight, the neighbor receives a present, and the twins end the day content and sleepy after their triumph.