Age-appropriate 'don't give up the code word' games. Stay in character, never confirm the secret exists, and practice resisting casual, persistent, and bribe-based pressure through your cover story.

In our training context, 'interrogation' means a friendly pressure situation: someone — a sibling, a friend, a 'suspicious adult' in a scenario — is trying to get you to reveal information you've agreed to protect. Usually a code word, a password, or the location of something.
The skill is staying calm, staying in character, and not giving up what you've promised to protect.
The strongest defense is your cover story. If asked a direct question, the answer isn't 'I won't tell you' — that confirms the secret exists. The answer is whatever your cover story says.
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Never use field techniques on private property without permission.
Never hide or transport anything dangerous, messy, or valuable.
Always operate within boundaries set by your parents or guardians.
Debrief your Handler after every mission — no exceptions.