These are definitely the first two publications for the "Moderný Pračlovek" sequence (Modern-day Caveman). The most crucial idea was to represent caveman drawings within a very simple way and products that were being used at that time... but also in our times. The primary 1 — “Kuchyňa Pračloveka” (Caveman's Kitchen https://maplepublishers.com/blog/author/maplepublishers/page/2/