They're the very first two publications with the "Contemporaryý Pračlovek" series (Modern day Caveman). The principle plan was to depict caveman drawings within a very simple way and products which were being applied at that time... but also inside our days. The first a person — “Kuchyňa Pračloveka” (Caveman's Kitchen) https://maplepublishers.com/blog/author/maplepublishers/page/4/