'Three Cheers for Inventors!' is very fun, with a comic-strip style presentation (but still entirely accurate to history) - ISBN 978-1406301717. Have you consi

'Three Cheers for Inventors!' is very fun, with a comic-strip style presentation (but still entirely accurate to history) - ISBN 978-1406301717. Have you considered the most straightforward option: Wikipedia itself? I was lapping up Wikipedia at age 6 and I've never stopped reading it since. It goes without saying that I haven't run out of articles yet! Another advantage is that it's easy to print hard copies, and if the language is too complex there is the 'Simple English' language Wikipedia.