The magic wand

 Amps and I used to have this friendly evening debate: would you want a magic wand that would make you an amazing Thai dinner? Or one that would clean the kitchen afterwards? We both agreed that cooking is a lot more fun than cleaning, so we'd go for the clean-up wand. 
     Fast-forward many years ahead to today. The question I have for you is: how much would you pay for a wand that puts your children back to sleep?
Now, there would have to be some rules. The wand wouldn't work, say, when the child shouldn't be sleeping, so you couldn't just use it like a mute button (now, a mute button for kids? Probably that would be popular too. I won't go there).
     But at night, when it's sleep time, you could wave it, and your kids would go back to sleep. 
    I think this would change the world. Like a washing machine or a toilet, everyone would have to have one.  Who scrubs all their socks on a washing board these days? If you didn't have one of your own maybe there'd be a wandromat or something where you could borrow one for a bit. Or maybe they'd be tied to property (like toilets); you'd mortgage an extra 100k for it and sell it when they got to be 8 or whatever. Like washers, dishwashers, dryers (I remember those! oh, I want one, not so much for the drying as for the floor space), running water: it would liberate women. Women, who are by far the majority of the night-risers, the night-feeders, the night cleaning-vomit-out-of-the-bed, softly-singing sleep-deprived pajama'd ghost-people ...
    I figure 100k is probably a little steep. After all, we can survive without this device, in some sense. But I'd fork over 20k without hesitation, especially if I could mortgage the thing. And I'm talking £ here.