Tina and Theo Theufel are stuck with parents who don’t have a dog but constantly want to eat beetroot. And they always think they know everything better. The parents, that is. The kids too, of course. After all, the apple doesn’t fall far from the tree. But at least Theo and Tina admit that they’re know-it-alls. Mom and Dad deny it. Which is, of course, absolutely ridiculous.
Not long ago, the Theufels moved into an old house with an attic full of adventures. Even though playing in the attic is frowned upon, Tina and Theo love nothing more than doing exactly that. And up there, they make a strange discovery: inside a box of books lives a tiny little man with a very big mouth. A genuine little know-it-all who claims to be visible only to others of his kind!
And one thing is certain:
“Being a truly real know-it-all is hard work! You have to be well informed, you have to be quick on the uptake, and you must be relentlessly committed to correctness.”
But can Mom and Dad see the little know-it-all too?