To access this collection of interesting objects to use in your game, hit CTRL + SHIFT+ C to open up the cheat menu and type in bb.showhiddenobjects
Then, go to the search function and type in debug and start checking out the wealth of new things!
Here is just a sampling of some of the things you can find in the Debug category:
*****NOTE: I just tested and discovered that the debug objects to NOT transfer with a lot. This means you can use them for pictures or machinima.....and for lots you are playing....but not for sharing with others. Hopefully this is something they can fix in the future.