As my animatic and animation will be in black and white my concept art is, too. Especially the first one looks like an ink drawing to me, I used to do them about 10 years ago (fairly close to my chosen age range of 10-12/13!)
It's late but I can't sleep so I might as well put my time to use :p
These are my first two concept art pieces and I will do one more tomorrow, then all I have left to do is put it all together for Monday! I don't feel so horribly under-prepared anymore!