Since none of our European friends have actually seen the US surprise box, maybe you might like a better idea of how to make one. Without getting into specifics, the Surprise box has things like pens, lanyards, paracord, watch bands, lights, carry pouches, one-piece tools, SAK parts, and sheaths. There are multi-tools and knives as well. If you will look at the things kept by the US members, you will see all of these sorts of things. Most recipients keep a few things and put some items back. Some of them are expensive. Some are not.
I remember friend Antti sent an item to Frenchephaistos recently. We have several Finnish members who could potentially be part of the game. If anything could be sent from Finland to France (you already know, Antti), the box could circulate around France and maybe some neighboring countries. Depending on shipping and laws. There are lots of UK members, but their new shipping laws might not allow entry.
Find out what works. Put together a few things and see who wants to receive the box and then pass it on. If nobody does it first, it won't happen. It could be done satisfactorily with just items like I mentioned and NO knives at all. Best wishes. G