A:AnswerIf you have home wi-fi and buy "smart plugs", yes.
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A:AnswerNot directly (no FM tuner) but using iheart radio you can live stream radio stations. I have the local FM station streaming Christmas music on my echo dot as I type this.
A:AnswerI have three different units and they play different music if I asked them separately or I can have them play the same music if I put them in an all room group.
A:AnswerSlightly larger, nicer looking mesh fabric instead of plastic, and much better sounding speaker are the main things. Also the newer one can be used in a stereo pair if you have two of them.
A:AnswerYes, the dots can be programmed through the Echo to do a bunch of things, from acting as a switch to game devices. If you want to see what games are available, look for Alexa skills on Amazon’s website. They have a wide variety for all ages, including things like Jeopardy.