From start to finish, I estimate that it took about 2-3 hours. My favorite part was shading the squares on the rubik's cube. I am trying out ways to be experimental with representing different colors by using different patterns to shade. I think this was a pretty successful attempt, but I'd love to hear your opinions and suggestions!
I love how you have combined two, as you said, iconic toys in this pic. ^^
Oh, and the square shading is wonderful.
This is beautiful.