Poppo, a 6 year old ""human dynamo"" of Puerto Rican descent and off-the-street-Americanese, wandered into a Brooklyn Heights apartment and stole the heart of owner-author Josef Berger. Poppo's adventures in this household and his growing up problems with street gangs, stealing, scraps and ""where do babies come from"" dilemmas take up much of the book. Poppo's final decision to remain with his family rather than have ""Joe"" adopt him is warm and charming in its naturalness. The urban humor and the little-man hero make this appealing for any age group.