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| Pentominoes | Boxed In | Frog Pond Puzzle | Frog Pond Puzzle |
| Probably the most famous of the packing puzzles. Dr. Solomon Golomb has described a number of interesting mathematical aspects of this puzzle. | Non-rectangular pieces for those who don't like to be square. | Can't tell what the puzzle looks like from this, I just liked the box. | From the back you can see (kind of) that the pieces are constructed of unit hexagons. |