Ever seen a 3D-printed lightsaber like this? I made it myself with Bambu's "Motion-Activated Sound and Light Props Kit" — it's remarkably easy and absolutely feature-packed! The 3D printing company now sells ready-made electronics kits to drop into your creations, and you can already find files for this double-bladed saber (by Joel He), a Master Sword from The Legend of Zelda, and a Wukong staff. Some of the files need more screws than come in the kit, but this one's solder-free. The result is a