Vaper...
No, it isn't healthier than not vaping.
It is healthier than smoking, according to PHE, that is unlikely to change, not because vaping is really healthy, but because smoking tobacco is reallllllllly ridiculously dangerous to health.
We should be encouraging smokers who want to give up to use vaping as one of the available options towards not smoking OR vaping.
We should also be encouraging smokers who have no desire to give up, to use vaping instead. (I fall into the this category, I liked smoking, despite all the reasons not to but my health and my wallet did not).
We should not be encouraging children to vape, or those who do not and have not smoked, to vape, no matter what their age - however it is in the nature of teenagers to try stuff they're not supposed to do/are not yet old enough to do.
I can see why parents might suggest that vaping would be tolerable to them, if the child does not smoke as a result.
Vapes can come as pre-filled disposable units that combine battery and nicotine e-juice in a variety of flavours. These are small, reasonably cheap and available widely though I think there is an age restriction of 18 (not sure, I am 42 and these things didn't exist when I was under 16 and ciggies you had to be 16 to buy!)...
Or they can be battery powered units that take a removable refillable tank, that contains a coil which is replacable, that they fill up with juice. The juice can be bought ready made or you can mix your own - this is a faff and a half and heads towards beardy man bun territory tbh.
Theres more variations but kids are unlikely to be bothering with rebuildable coils etc.
Box mods (battery powered units for use with a tank) cost IRO 25 to 70+ quid, the one I have was 40 quid and has lasted me over a year of daily use - it is significantly cheaper than smoking for me, I have several tanks and rarely break one so the cost is the juice and the coils on a weekly basis, about £20 a fortnight if I am being lavish!