Exactly, we need more radioactivity.......Maybe Radium?

anti-matter destroys anything on contact with any non anti-matter material and creates alot of energy and reduces pressure and can be stored using magnets (depending whether it is negitive or posotive if it is a positron or anti-proton)

BIO-VIRUS remember to use search function before you post your idea it is possible to someone posted that before!!

And at this case it was.....

Wilq15
In this case... It's made not official but in antb's mod.

Now that I think about it, the powder toy needs nothing more. Nothing but sound! I know this has probably been suggested before, but I'm not talking about sounds for explosions and other phenomena. I'm talking about an element which gives a certain frequency (dependant upon how much of it there is) sound when electricity traveling through a wire touches it (like LCRY). This could be used in electronics as an indicator or in other saves to make musical instruments. At least it's more usefull than chocolate.

that sounds great!

maybe polon?
polonium