The puzzle cube is one of Sandy's inventions. It appears in the episodes "House Sittin' for Sandy" and "The Krabby Patty That Ate Bikini Bottom."
It looks similar to a Rubix's Cube, but has different shapes. The colors on the cube are blue, red, yellow, green, and white. It is able to solve itself and never lies.
Role in series
"House Sittin' for Sandy"
The puzzle cube is seen on the bookcase full of Sandy's rare artifacts.
"The Krabby Patty That Ate Bikini Bottom"
Sandy shows Mr. Krabs
the puzzle cube during the latter's brief visit at Sandy's treedome
. Later, Sandy tells SpongeBob
that the puzzle cube told her that he was the one who could stop the Giant Krabby Patty
by making direct contact with it.