The Pyraminx can be rotated around any of its vertices by multiples of 120?X. This makes it hard enough to be a real challenge, but easy enough to master, without help, in a few days Game Play Information:Number of players: 1 to 1 Age of Players: 12 to 99 YearsSkill level: IntermediateTime to Learn in Mins: 60Time to Play in Mins: 60Profanity: NoBatteries Included: Not RequiredBattery Details: Choking Hazard: NoAdditional Information:Publisher: Uwe Meffert Item ID: 779090200484 Product Dimensions: 4.4" x 5" x 4.25" Language: EnglishCountry of Origin: UN