What's a good Christmas present to give a 7 year old who's getting into spy and detective stuff? My 7yo niece seems to be really getting into spy/detective stuff. Her birthday recently involved solving clues using a book with various ciphers to find presents, and she recently even set up something similar for her parents to find.

I'd like to give her something along those lines for Christmas, especially since I was also really into spy/detective stuff at that age. I do have ideas for books (eg Nancy Drew) but I'd love to get her something interactive - she's pretty artsy and crafty and also loves science experiments. Something experiential could be cool - she goes to that one science museum in Bristol (I forget the name) pretty often but I'm not sure if the family are escape room types. As far as I know they don't have any game consoles in the house and I don't think her parents would be into letting her play computer games, but board/card/ttrpg games could work.

She's in the UK and I'm in Australia, so preferably something I can get from the UK and delivered to her directly would be fab. I do want to craft a puzzle or two for her as part of this present, so if the sender is ok with custom messages that'd work!