The first Jack O'Lanterns were carved from Turnips (or arguably rutabagas)
According to legend, Jack was a wicked man, who managed to cheat the devil himself, and as a result, Satan agreed that he would never take Jack's soul to hell.
However, being such a wicked man, when he died, Jack found himself unable to gain entry to heaven. He pleaded with the devil to take him, but he reminded Jack that per their agreement, he could not take him to hell, and so with nowhere else to go, Jack would be doomed to wander the earth for all eternity.
Jack asked the devil to at least give him a lantern to light his way, and the devil tossed Jack a burning coal, which jack stuck inside of the turnip he had been eating when he died to use as a makeshift lantern.
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When my wife and I first moved in together, we had a small apartment without much room on our patio for Jack O'Lanterns. Undeterred, I went back to the original concept and started carving turnips, which fit much better on the outside of our windowsill.
To hollow them out I use a forstner bit that's a little bigger than the LED tea lights I stick in them.
I think they have a lot more character and are a lot creepier than pumpkins.
My dremel has a persistent dusty orange coating. Veggies are quite wet when the bit is spinning at 15,000rpm. I'm not truly worried about the spray shorting anything due to the heat of the motor, but everything will probably get coated, including your face. Safety glasses are a must. To be fair, I use the wood carving disc (gold diamond crust) to do shaping and thinning, so the linear speed is higher at the edge. I've also never handled a turnip, so you're meterage may vary. A lot.
Don't have it but want to get that wood disc. But there are loads that I want and aware that I shouldn't just buy all of them.
At some point I think I should buy proper wood boards to work with. Want to make a board game - game of Ur can be carved onto a simple plank, then decorate each square with a carved shape or pattern. Coasters are another one.
Been drawing patterns lately, one I quite like is a cat with a herring bone repeating background that I hope would come out nicely as a line carving.