Please do not leave your lightsabers lying around where they may fall into the hands of children.
On the other hand, (assuming it’s still attached) at least a lightsaber isn’t a choking hazard. If you look on the bottom you might see a sticker:
WARNING: KEEP AWAY FROM CHILDREN. LIGHTSABER BLADES ARE DANGEROUS FOR PREGNANT WOMEN AND EVERYONE ELSE. DO NOT USE IN BATHTUB. AIM AWAY FROM FACE. IF CONTACT OCCURS WITH SKIN, YOU’RE PRETTY MUCH SCREWED.