Colouring book pages.

I require 30 (maybe more in the future) colouring book type pages for an app. Each page requires to be a set size and saved as a png. The pages will be of mixed themes but will be simple designs for children, pages of fruit, letters, numbers, sun star moon, animals (dog cat etc).

Each page will have a white background and will be drawn with thick black lines. Please provide a example of your work and a rough timescale for completion.

Thanks

James