Stay sharp all year with a calendar packed with puzzles designed for brain fitness. PUZZLES TO KEEP YOUR BRAIN SHARP: Keep your new year s resolution to keep your brain fit with a brand-new calendar that s jam-packed with puzzles designed to strengthen concentration, short-term memory, attention to detail, and processing speed. ENTERTAINING TRAINING: Enjoy a variety of fun logic puzzles, number and word games, visual brainteasers, and more, including Pattern Recall, number game Calcudoku, and Change a Letter. Each day s puzzle specifies the brain function it works out, so you ll know why you re playing. ?NOW PLASTIC-FREE!: Page-A-Day Calendars are environmentally friendly! Printed on responsibly sourced paper and 100% recyclable, with sturdy cardboard backers.