They are the initial two publications for the "Contemporaryý Pračlovek" sequence (Modern day Caveman). The primary idea was to signify caveman drawings in a very simple way and products that have been made use of at that time... but in addition inside our times. The 1st one — “Kuchyňa Pračloveka” https://maplepublishers.com/blog/author/maplepublishers/page/6/