Jean-Jacques Sempé, usually known as Sempé (17 August 1932 – 11 August 2022), was a French cartoonist. He is known for the series of children's books he created with René Goscinny, Le petit Nicolas, and also for his poster-like illustrations, usually drawn from a distant or high viewpoint depicting detailed countrysides or cities.
Source: [Jean-Jacques Sempé]( on Wikipedia.
Nicholas is invited to a birthday party by the girl next door, plays a very messy game of chess, and learns that walking on your hands is much harder than turning somersaults.