Download or read book BrainDoku Hard Vol 3 written by Lake Cottage Press and published by . This book was released on 2020-05-06 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: HARD 4x4 grid sudoku puzzles for kids - Easy puzzles to challenge your child's brain- A great way for children to improve logic, deductive thinking, and reasoning skills at home- Encourages time away from computers, T.V's, phones, and game systems- Hours of fun with entertaining and educational puzzl