These are definitely the first two publications to the "Moderný Pračlovek" series (Modern-day Caveman). The main idea was to depict caveman drawings in a quite simple way and items that ended up used at that time... and also inside our times. The 1st just one — “Kuchyňa Pračloveka” (Caveman's Kitchen https://maplepublishers.com/blog/author/maplepublishers/page/5/