Other chapter books - classics? Dunno

We powered through The Magic Faraway Tree by Enid Blyton this week. Nathan just adored it. Guess it appealed to his sense of imagination and doing all sorts of things you could only dream of. I kept getting "can we read one more chapter?" to the point where my voice would start to go croaky after about a 1/2 hr.

Words like fiddlesticks and bother really tickle his fancy. Unfortunately he can't say his "f's" well atm, and it comes out as piddlesticks lol.