Historical clue formulations

• Some repurposed cornfields — 2026-01-30
• Games on some kids' menus — 2026-01-11
• Achievements in large-scale topiary — 2017-04-22
• Some repurposed cornfields — 2016-03-17
• Features of many kids' place mats — 2014-05-25
• Labyrinths — 2013-07-15
• Activity book staples — 2010-04-10
• Lab challenges — 2009-09-20
• They may be child's play — 2005-04-01
• Puzzles solved with a pencil — 2005-01-26
• Challenges for rats — 1999-09-30
• Some pencil puzzles — 1999-03-04
• Lost worlds? — 1998-02-12
• Some ancient mosaic designs — 1997-01-04