I assembled an arc lighter DIY kit from Aliexpress1 and combined it with an 18650 battery and a TP4056 charging board2.

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Assembled electronics

I created a pattern for a box using Boxes.py and then modified it in Inkscape to add the labels and cutout for the USB plug.

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Pattern for laser cutter

Here it is glued together.

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Finished lighter

My daughter painted one camo.

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Painted camo

Footnotes

1

On Aliexpress, the item is called "DC3-5V DIY Kit High Voltage Generator Arc Igniter Lighter Kit For DIY Electronic Production Suite"

2

To allow charging via USB-C.