Verified answer

No they cant but that was a good question. (I gave you a star.) What you saw when it was glowing was an exothermic reaction between two chemicals inside the stick. The light it gave off is now gone.

no it won't. It is a chemical reaction. BUt the "The dyes used in glow sticks usually exhibit fluorescence when exposed to ultraviolet radiation. Therefore even a spent glow stick will shine under a black light."

Put it the fridge, I think I read somewhere that it makes it alive again!:D