There are several objects that you can spawn in the game:
All of them have a random material set when they're spawned.
They do not have descriptions.
"Nothing really special, but its fun to throw them"— The old description
The main object you will likely use when building something.
"The only object in this game with less than 1 unit of mass"— The old description
Can be fun to watch one fall on a ramp.
Stuff that explodes (no shit sherlock). All of them activate when they hit something with high speeds (and nearly all of them activate using the Button).
Most fragile explosive in the game. Fun fact: it used to look like a single, small but kinda tall cube.
"Warning: Dangerously explosive (and loud)! This is the heaviest object in the game"
No additional description, the in-game description already said everything needed(?).
"Warning: Fast and explosive!"
The (currently) second heaviest object in the game. Also the only object that can move by its own.
"Warning: Unstable and explosive! May explode at any moment!"
The only explosive that can explode by itself.
"Activates all activable objects"