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All answers having "Child's game" as clue:

3 Character Answers:

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TAG



4 Character Answers:

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ISPY



8 Character Answers:

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LEAPFROG

SQUATTAG



9 Character Answers:

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HOPSCOTCH



11 Character Answers:

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HAYDNGOSEEK



14 Character Answers:

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COPSANDROBBERS



15 Character Answers:

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FOLLOWTHELEADER