Bram & Oskar Gear 2x2 Cube (standard)

The Bram & Oskar Gear 2x2x2 Cube, and Gear 2x2x2 Cube Plus, designed by Oskar van Deventer, was invented by Bram Cohen.

In 2009, for the Bram & Oskar Gear 2x2x2 Cube, Bram's idea was to add eight gears (7-teeth gears) to a 2x2x2 Cube. 

When the top is turned by a quarter, the gears turn by one eight. For solving this puzzle, not only do the regular pieces 
have to be in the right places, but also the gears must be in both the right location and in the right orientation, making 
the puzzle very difficult.

In 2015, Oskar presented an improved version he called Bram's Cube Plus. Hence here, we have the Bram & Oskar Gear 2x2x2 Cube Plus. 
Bram's Cube Plus is a variation of Bram's Cube. Bram Cohen suggested that Bram's Cube could be improved as puzzle by having 
6-teeth gears instead of 7, and by exposing and stickering the slider pieces that connect the gears to the cube