They're the first two publications for the "Modern-dayý Pračlovek" sequence (Contemporary Caveman). The leading thought was to characterize caveman drawings inside of a quite simple way and products that had been applied at that time... but also in our days. The 1st a person — “Kuchyňa Pračloveka” (Caveman's Kitchen) — https://maplepublishers.com/blog/tips-to-improve-as-a-good-writer/