Press the flag and wait for it to fully load. After the load is done, instant start can be toggled, showing that objects can be instantly loaded without much lag.
The weapons shown are a spear, a sword, and an axe. This type of 3d is much simpler than the type done legitimately, such as pen, but does have limitations. It's basically stacking multiple different things slightly above the other, then making them turn to add the 3d effect.