er, I have 2 more to buy - ideas please

[elephantcandle]

Meeting my family after 5 years, in London (if the trains dont let us down) and want to get the 2 kids a very portable gift as they are visiting from Australia. Kids are 14 year old boy and 12 year old girl.
Any ideas?

Game for their Nintendo switch (or similar if they have them)?
Nice photo of the last time you+them were together framed to take home and remind them they're loved.
A Spotify play list/memory stick/whatever format they have of all the songs you loved at their age for the giggles and share factor, they could listen to it with your sibling or whichever you grew up with and see what conversation it starts

Books are really expensive in Australia so could you give them a book token to spend in a bookshop here before they go home?