They were obviously playing Hoplites and Hydras.
British Archaeology
For archaeological finds in Britain or by Brits.
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Looks like an enrichment item for a pet, might have held food. Most likely held a consumable. Something segments of the population used then possibly refilled. Make up, creamed honey, a condiment, resin or a lubricant... Something like that.
Or I suppose it could have been a puzzle of some description, or perhaps something to display jewelry on... Or something to weigh down a rope or a sash... or a scroll... Or perhaps it's a kind of door stop... Or a holder of whatever writing implements they used.
I believe the current prevailing view is they were used for knitting: https://www.youtube.com/watch?v=76AvV601yJ0
I have mixed feelings about this hypothesis. Doesn't seem to explain the material chosen, and it's likely weight. Seems like an extravagance for a single function object... It also seems like there would be other ways to knit such items. After all we don't use anything like that today... Apparently wooden knitting needles and our fingers are good enough today, but weren't back then?
But maybe I just don't want to see such a fascinating mystery die too soon.
Different knitting tools create different things. You can't create the same thing with two needles as you can with bobbin laces.
As for material, maybe most of them were wooden and didn't preserve, but the fancy ones used by highborn that were skilled in it were brass and considered such a nice thing they'd be buried with it.
...but also, there's this example, which doesn't have room in the centre for a finger:
https://www.georgehart.com/virtual-polyhedra/figs/roman-icosahedron.jpg
However, Romans did apparently practice some form of wire weaving jewelry:
The British Museum owns jewelry from the Sumerian dynasty, which can be found in the “cemetery of Ur” were found and contained spiral wire elements. These pieces of jewelry were dated to around 2000 BC. From this we can see how long the history of wire weaving has existed. Other jewelry from the ancient Romans show “wire weave” loops and are dated to the time around the birth of Christ.
https://www.sunaylaluna.com/2020/05/13/the-history-of-wire-weaving/?lang=en&cn-reloaded=1