Online since 2002. Over 3300 puzzles, 2600 worldwide members, and 270,000 messages.

Member Collections > Mark Havens - Mark's General Collection
4X4X4

5X5X5

DODECAHEDRON

SPHERE

STAR

MOVING HOLE

MOVING MARBLES

MOVING TILES

FOLDING

ELECTRONIC

PATTERN MATCHING

OTHER MECHANISMS

GAMES



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Super Brain Spinner
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Brain Twist
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