I decided to make a mini collection of stickers with animals and fitting puns. 
Sketches first:
I wanted to give each one its own colour, so made them match by using one lettering style. Colour:

I used Procreate, and kept the animation simple. I tried a few different options. Final result: 

This exercise forced me to keep my illustrations and letters simple, which really helped. I also liked trying out a few different basic animation techniques. 

I might add some more animals to this collection. I'd love to hear what I could improve about the movements moving forward!