CreateBecomeArt 2 points
For me personally :
A money reader. All paper bills are the same size with no texture marking to tell the difference between like coins. I know there are some money readers out there but a little competition wouldn't hurt. More options and prices to compare.
Print readers. Hold the device over what it is you want to read and have it read out loud what's on the page, label, sign, ect. There may also be such a device out there but again, different brands and prices to compare for the consumer.