Sound module character design

First drawing of Mister Raddish

The brief for our sound module this year, is to make a 10-20 seconds animation which, obviously, includes thought-out sound design. I have decided to stick with a very simplistic visual approach because I think this will encourage me to use sound as a way to enrich the story and make it come alive. Also, I won't have much time to focus on this module so I probably don't want to go for anything too complicated. I'd like this to be a relatively quick turnaround.  

My idea is quite simple as it just involves an odd-looking couple having a baby. It came from a scribble a made a few weeks ago about which my friend said that it looked like a radish and that he could imagine someone pulling it out of the ground. I thought that's probably where radish people come from and decided to use that as an idea. You see, radish babies are born in the garden.

I would like the backgrounds for this to be as simple as possible without just being white space. I may just use splashes of colour to indicate where the characters are and then let the sound do the rest. As a stretch goal, I'd like to use music but I'm not the best musician so I'll see how it goes.

These are some design ideas I played with. The ones on the left are probably the final designs.