Level 9 has some simple shapes also and judging by the solution counts they are all quite simple. The 2x4x4 can be made with the two 1x4x4's of course. And the 2x4x5 can be made with the two 1x4x5's.
2 x 4 x 6 (73)
2 x 4 x 8 (423)
Even the 2x4x8 can be solved using the two 1x4x8's.
