To color or not … that is the question

I’m going to bore you all once again with mock-ups for cover of the book I’m hoping to get out the door soon. I really need your help. Here’s the original which a few folks thought needed some color.

So I added a bit of color. Obviously I’m not a cartoonist. My husband came by and said “Are you taking up coloring now?”

So I don’t know. Is the choo-choo train a little too much? Green bubbles a bit icky?

I woke up this morning with an absolutely fabulous idea for the back cover. No synopsis or bio. No glowing reviews but just this:

I know it’s not very professional but I honestly don’t expect to set the world on fire with this little book (only 48k words). I just promised someone I would republish it once I got the kinks out and she’s gone now.

What’s your opinion: Colored cartoons or not?

Choo choo train or no choo-choo train?

Thanks!