First,
the one on the far right looks like it might be ready to set itself off. Those smokes can get hot, so I wouldn't store that somewhere valuable.
The training grenade, there's been one arrest that I've posted. And, that was for just the fuze section, there weren't any charges attached.
With the shape that fuze appears to be in, I'd be very leery of trying to unscrew it. Look for a hole in the bottom. If there is no hole, pitch that thing in a deep ocean. If there is, look for a short tube projecting downward from the fuze. If no, it is probably done. If you see it, it is potentially live.
Don't listen to a single person telling you stuff about colors. COLORS MEAN NOTHING. EVER. There are (and not saying this is your case, OP) too many hacks that like to try and rearm training stuff with not enough knowledge and experience. I've been interested in this kinda thing since I was a kid, and I'm 44 now. I have trouble telling between a training fuze and a fuze for a full up frag sometimes. Spoons (bouchons) can be swapped or painted.
All I am saying is these would be poor examples for you to put on your mantel. Good luck.