Triangular Floppy Prism
This puzzle has been built and is also known as the Slim Pyraminx.
It is a slight extension of the commerically produced puzzle called
Rubik's Cheese.
Java Applet Instructions

The Green Flag resets the puzzle.

Pressing the Spacebar scrambles the puzzle.

Down Arrow turns the bottom six triangles by 180 degrees. The
same can be achieved by clicking on the triangle immediately above
the bottom corner.

Right Arrow turns the rightmost six triangles by 180 degrees. The
same can be achieved by clicking on the triangle immediately to the left of
the right corner.

Left Arrow turns the leftmost six triangles by 180 degrees. The
same can be achieved by clicking on the triangle immediately to the right of
the left corner.

Pressing y or z turns the bottom triangle by 180 degrees.
The same can be achieved by clicking on the top of this triangle.

Pressing s turns the right corner triangle by 180 degrees.
The same can be achieved by clicking on the top of this triangle.

Pressing a turns the left corner triangle by 180 degrees.
The same can be achieved by clicking on the top of this triangle.

Klicking on the top of one of the central edge triangles turns
the entire edge by 180 degrees.

Pressing q flips the entire prism over by 180 degrees
in the direction back > right.

To solve the prism, you have to get the top side yellow,
the left side blue and the right side red. (The green back and the white
bottom are invisible.) When you solve it, your time taken is displayed
for 5 seconds.