Surround Sound
This one is actually one of the more creative finds on the list. Apparently, the OP’s mother-in-law’s new home has a built-in cassette player and the best part is that it plays through the entire house. Frankly, if you love music we don’t see why you wouldn’t love this.
We mean, sure, music in ALL the rooms of the house would probably get tiring after a little while but still, we’d love to give it a go. Of course, cassettes may pretty much be obsolete but maybe they can get someone to update it to something more modern instead. An Mp3 player would make the most sense.