Trinomial Cube

The trinomial cube is similar to the binomial cube, but has the following pieces instead:

• 1 red cube and 6 black and red prisms (varying in size)
• 1 blue cube and 6 black and blue prisms (varying in size)
• 1 yellow cube and 6 black and yellow prisms (varying in size)
• 6 black prisms (same size)

This is similar to the binomial cube, but is a physical representation of this formula: