A 24mm transparent 20 sided die with a mini 20 sided die inside (a die within a die). generates numbers up to 400 and can be used to practice basic math skills, and enhance all games and activities.

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A 24mm transparent 20 sided die with a mini 20 sided die inside (a die within a die). generates numbers up to 400 and can be used to practice basic math skills, and enhance all games and activities.

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