Illustrations for 2 children's books

I have 2 children's stories which I have written that need illustrating. They both aimed at 4-6 year olds and revolve around the same three characters.
The books are 20 pages and 24 pages long and require a full-page illustrations on each page.
Each book would also need a suitable cover illustration.
The style of illustration is up to you, but it must be suitable for a children's storybook - i.e.: fun, colourful and full of character.
If you want to quote for this, please provide examples of previous illustrations you have done in a similar style.
I would like the final images to be provided as hi-res .tif files (min. 300 dpi) and sized to be suitable for print at A4 size.
Timescale is not critical but I would like to have the books ready to publish by the end of November 2013 if possible.