Much of my childhood was spent reading Enid Blyton but I did digess sometimes and there are a few books I would like to track down for my dc. One was about a magic tollbooth - I can't remember any more of the story except I enjoyed it and it made me think- I have found the Phantom tollbooth is that likely to be it? Think dd1 would enjoy it.
Also I remember a story about an inventer who came up with all sorts of mad inventions - one of them was a machine which could paint a flagpole, but he started it at the bottom and then was stuck at the top because there was wet paint below him. dd2 would enjoy it if I knew what it was called.