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These puzzles can be difficult even for advanced puzzle solvers. Check out the descriptions for details on difficulty. Some, like the 4-Color Infinity, may be impossible to solve by intuition alone, and require formal algorithmic analysis.
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  • Colorful plastic mechanical puzzle brainteaser fidget with interlocking beads held in hand. - andEleven - The Taurus (4-Color)

    The Taurus (4-Color)

    The Taurus (4-Color)
    $33.00 CAD
    $33.00 CAD
  • Triangular mechanical puzzle with three interconnected colored tracks and small beads, a brainteaser fidget toy held by. - andEleven - The Triad

    The Triad

    The Triad
    $32.00 CAD
    $32.00 CAD
  • The Delta (3-Color)

    The Delta (3-Color)

    The Delta (3-Color)
    $32.00 CAD
    $32.00 CAD
  • Compact black mechanical puzzle with purple, orange, and pink pieces, held in hands, labeled Level 9/10 brainteaser fidget. - andEleven - The Infinity (3-Color)

    The Infinity (3-Color)

    The Infinity (3-Color)
    $32.00 CAD
    $32.00 CAD
  • The Delta (4-Color)

    The Delta (4-Color)

    The Delta (4-Color)
    $32.00 CAD
    $32.00 CAD
  • Compact black mechanical puzzle with colorful interlocking loops, a brainteaser and fidget toy held in hands. - andEleven - The Infinity (4-Color)

    The Infinity (4-Color)

    The Infinity (4-Color)
    $32.00 CAD
    $32.00 CAD