This is my entry :D
first, I got to draw the shape with a light colored pencil like this 'B'

so it looks like this

then, I started to add the volume and shadows with a darker pencil,

it was with the '2B'

it started to look like this

then I added darker shadows and volume with a darker pencil

this time was the '6B'

after some coloring, this was the final result :)

I had a fun time making this entry! thanks for bringing this cool idea on steemit