The latest Paperwhite Kids is down to $149.99 ($30 off) at Amazon and Best Buy, which is its best price since December. The ad-free e-reader is identical to the standard Paperwhite but comes with a cover, a two-year warranty, and six months of Amazon Kids Plus, which includes a library of kid-friendly books and games. The parental controls are optional, too, so it’s a great deal for adults and kids alike.