Robin song was created over several hundred hours of work.  I started out by hand painting and scanning all the elements onto my computer.  Then cut them out and built the sets.  Once everything was made I could start animating and moving cameras around within After Effects.  On this one animating and set building took about the same time.  Each of the five sets took close to two weeks to create.  One of the reasons this took so long is I did everything by myself...although that's pretty common for me.  I am quite happy with the results.  I hope you enjoy.