character: Bobby the Boxcar
topic: Importance of Signals in Train Safety
grade: 4
subject: Reading
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character: Bobby the Boxcar
topic: Understanding Stop Signals
grade: 4
subject: Reading
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character: Bobby the Boxcar
topic: Role of Lights and Sounds in Train Safety
grade: 4
subject: Reading
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character: Bobby the Boxcar
topic: Safety Rules for Train Passengers
grade: 4
subject: Reading
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