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Classic
24 lateral thinking technique cards. Each person gets a different lens — inversion, reframe, analogy, constraint, and more.
Colour Thinking
36 cards based on the Insights Discovery model. Each person is randomly assigned a colour: Red, Yellow, Green, or Blue.
6+1 Hats
28 cards based on De Bono's Six Thinking Hats, extended with a Royal hat. Each person wears a different thinking mode.