Drawing during class

I've been busy with college, so I haven't been drawing a lot.
But I got so bored during class that I decorated each slide on the power point with a tiny drawing. I cropped all the drawing to paint and made this collage.

this is done with a bamboo tablet. Using the drawing tools on the power point, I colored most of the drawings with the highlighter tool to be fast.
I just realized they are all nature related except the monster face.
Oh, and the butterfly was a molecule, but I thought "hmm, this look like a butterfly" so I added the butterfly body and the flower. :D

End