Checked Bags: YesSadly, the technology doesn't currently exist to create a real lightsaber. However, you can pack a toy lightsaber in your carry-on or checked bag.
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Firearms, ammunition, and fireworks are prohibited, as are all knives and safety razors (including pocket knives and Swiss Army knives). Straight razors and replacement blades for straight razors are also not allowed. Most tools also cannot be packed in carry-on luggage, as they have the potential to cause harm.