My favourite handheld entertainment device is a book.
Not the same book, of course, but a new one each time I finish the one I'm on. No wearout or boredom factor, with a new book available anytime I want.
There are several other advantages over electronic handhelds as well, including: cheap, recyclable, virtually indestructible (carry in hand, pocket, bag etc), less tempting to opportunist thieves if you should happen to inadvertently leave your book on the table after coffee, endless variety of topics, genres, and authors, (thus customisable to suit your exact personal preferences), non-irritating to fellow bus, plane, train passengers, and of course, books never need recharging, or batteries.
Plus, as a keen writer (I assume you are too, given you're a fellow Hubber..), I find reading is a great way to observe good writing skills and techniques, and learn from the talents of others. Education and entertainment in the one package. What's more, that learning is transferable, even convertible into money, if you use it to improve your own skills, and apply it when writing revenue-generating Hubs.
Of course, if you're totally committed to buying an electronic handheld, you can easily combine both worlds, and grab yourself a Kindle....