The Kindle has to be in the running as perhaps Amazon's most successful product line in terms of cultural penetration – people say "e-reader" far less than they say "Kindle", and its popularity ...

SAVE $40: As of Feb. 17, you can get the Amazon Kindle Paperwhite Kids for $139.99 during Amazon's Presidents' Day sale. That's a $40 discount and the lowest price we've seen on this model.