The toilet question is an interesting one and it's not only children's authors that gloss over it. Many 'quality' adult authors, too, have their characters tied up for hours on end without a thought that they may need to go the loo. However, it's Kiki's toilet requirements that intrigue me (although...

While I agree that Stuart Tresililan is by far the best of the Blyton illustrators, I could never understand why he always depicted Kiki the parrot as a cockatoo. A parrot looks nothing like a cockatoo.