No, anno, they are not scouts.
I think I must stop buying now! Today I have ordered the capsules and mini pens, which I shall put inside their crackers (I peel open bought ones), clear magic sticky notes, wind-up torches, Superdry beanie hats and pyjama bottoms/lounge pants.
Thank you all for your input.
If anyone else is looking for ideas, I can recommend 'invisible' security marker pens with built in UV torch, which I bought on eBay last year. Very cheap, and they enjoyed labelling their possessions and each other!