I know this has been suggested many times, or atleast I suspect so.
Solid Movable Non-meltable Particles SMNP N/A Doesn't change states or conduct. Stays in a group, low gravity(non-zero), low drag... basically a ready made bullet. I haven't done any code for this but I figure what you could do is get all the SMNP's touching eachother and load them into a pointer to a pointer, like int**, so it acts like an array of arrays. Then, whenever one of the particles moves, the rest move in its array move.
controlable battery CBTR solid CBTR>PLSM@ 5000C Sort of conducts only from p-type and n-type silicon but dont give charge to n-type gives to evry other conducter activated by ptype silicon deactivated bye n-type this would be helpful because when you try to make a controlable battery with battery and switch it breaks
just use something like this (but your own version)
What about glue? GLUE - "sticks" elements, makes a big "thing" that can move without breaking < as alternative it holds up powders up to solids, could be to liquids, Dissolves under heat (~ 50 C), washed by hot steam or water.