Related Clues:

• Some pencil puzzles
• Lab equipment
• Challenges for rats
• Some cornfield arrangements
• Tests for rats
• Puzzles solved with a pencil
• They may be child's play
• Puzzle-page offerings
• Lab rats' challenges
• Confusing pathways
• Labyrinths
• Puzzlebook features
• Complex paths
• Pencil puzzles
• Lab challenges