Brain Games
Sudoku
Crosswords
https://games.aarp.org/games/daily-crossword
New York Times Word Games & Logic Puzzles
https://help.nytimes.com/hc/en-us/articles/360029050872-Word-Games-and-Logic-Puzzles#SETANDKENKEN
Brain Games (offline)
Mazes (printouts) https://www.printableparadise.com/printable-mazes.html
More Games (online apps):
Braingle https://www.braingle.com/
Happy Neuron https://www.happy-neuron.com/
Luminosity https://www.lumosity.com/en/