Innovation Adds A New Layer Of Challenge To The 3X3 Cube. Touch The Cube Tiles To Temporarily Reveal Color. Solve The Latest Cube, The Phantom, As The Colors Fade In And Out Through The Heat Of Your Touch.Reveal The Phantom’S Colors With The Heat Of Your Touch. Solve The Cube Before It Fades Back To Black! Ideal Temperature For Playing With This Cube Is Up To 79°F Or 26°C.This Brain Teaser Puzzle Is One Of The Hardest To Solve Of The Rubik’S Collection. Puzzle-Loving Adults And Kids Ages 8 And Up Will Love This Anxiety Relief Puzzle Cube. A Combination Of Math, Art, And Science- The Iconic Rubik’S Cube Challenges Your Mind And Problem-Solving Skills.