This puzzle is a great way for blind people to have fun while testing their concentration since they can touch the squares and make them all match up.

https://www.amazon.com/Stickerless-Puzzle-Partially-Sighted-Weakness/dp/B07GWFTH5X/ref=sr_1_5?dchild=1&qid=1589408916&s=toys-and-games&sr=1-5&srs=19838986011