dainty 206-gram gizmo

Kindle Paperwhite reader is really a bang for the buck. Other than its dainty 206-gram lightness, it has a very powerful "vocabulary builder". Whenever you tap a word in the article, the explanation in the built-in dictionary pops up and stores it in vocabulary builder for later reference. In the vocabulary builder, you can trace the context of this word in the original article. Job well done, Amazon.