What's that noise?

A drawing for a children book I'm illustrating. The actual drawing hasn't been okay-ed yet, but here's what I did. Next step is to add color to it and clean it up a bit. The color that's on it right now isn't the final color... it's a quick ten minute coloring I did specifically for this post so that I'm not uploading a boring black and white image. The final color product won't look anything like this one. Enjoy!