CHALLENGE: Word Worm

WHY IT MAY WORK: In a 2019 UK study, regular word puzzlers bested those who rarely try these brain twisters on 14 tests for attention, information processing, executive function (planning and decision-making), and working (short-term) and episodic (a type of long-term) memory.

PLAY IT: Join the hexagons by creating words that are only one letter different from the connecting words. Each hexagon must connect to exactly two adjacent ones, as shown with FEET and R _ _ D. The result forms a continuous loop.