Woodworking

If you are using wood food skewers, they are probably bamboo. While not a wood, bamboo is actually really hard. On the Janka hardness scale it rates well above food safe, non-exotic, hardwoods like oak and maple.

Bamboo skewers are cheap, food safe, and available at almost any grocery store. They are one of my go to cleaning tools.

Definitely don’t go with any wood from a piece of furniture or a random piece of wood if you are worried about ingesting tiny bits of the wood. Some species of wood can cause real issues for people due to their oils and some more exotic lumbers are actually toxic. Wood used in furniture? You have no idea what that was finished with or what kind of glue was used.

Oak dowels will be 2 to 3 times harder than pine, and more durable because of that. Widely available at any hardware store.

Iron Wood

Reeds would be good for something like this, you can usually find dried bamboo pretty cheap at craft stores or in the garden section in spring.

Yes almost any wood is harder than pine. Old furniture tends to be a lot of oak, at least in my country. Here's what I would do: find any piece of hardwood. You can use furniture but you will probably find it easier to get a small branch off a hardwood tree. Any tree that has leaves instead of needles will be hardwood ( Some wood nerds would object). Whittle a few skewers out of the wood but NOT the pith- Not the dead center of the branch. After it's whittled it will be dry within a day even if it's green still. Then I would hold it over a fire/ stove a bit. Don't burn it, but the heat will toughen the fibers. That's probably the best bet.

Sorry about your nice post getting vandalized by that shmuck. They're banned now.