Oooh, what a great thread....
I like the Where's Wally idea, (im in the UK), and maybe in the picture you could embed the skills talked about in the book, and maybe pictures of you as a Wally character. The cover could then also be a poster that could be displayed, cos, well, everyone loves a poster. And throughout the book you could match the images... And hide things throughout.
Oh man, i love this, if you don't do this.... Im gonna.
As an alternative, you could go with the hitch hikers guide to the planet option, of a big friendly button with the words dont panic....
Or set a challenge.... SKIP this page.... Its boring
... I love a play on words.
Ho hum...