Joris is a super champion. What special is he going to do today? He wants to learn everything about dinosaurs and secretly goes to stay in the museum. Suddenly there is a sound. Joris, watch out! “Help!” Joris shouts. “Oh, how bad!” In front of him lies a mountain of dinosaur bones. But a little champion… knows immediately what to do! Joris is champion. In everything. And now he wants to figure out how a dinosaur works. He hides in the toilet of the nature museum and comes out at night. Everything goes wrong in the big dinosaur hall. Can Joris save the situation before his class goes on an excursion to the museum the next morning? Joris is a real puzzle champion, but he still needs a little practice on dinosaurs... A nighttime adventure in the museum for children aged 4 and over, about 'wanting to be the best'. Also read from Harmen van Straaten: - My car book - Hey, who's in the toilet?