I did most of the blender work on my Linux machine. No, I’m not rich, the Linux is all mine, bought with the proceeds of my first job using Blender. The other two are from my other two jobs.
I just used two relative keys and mixed them for all of the mouth moves for the banana and just one key for the tomato.
Too tired to search for the link that had a great tutorial for relative keys, but see if you can’t find it. It’s by ‘luckybreak’ and titled QUICK RVK TUTE INSIDE from Nov 27, 2003 in elYsiun Blender General forum.
Have fun,