Dr. Slump: Arale-chan - episode 3 - 21 Apr, 1981

Senbei shows Arale his newest invention, The Time Slipper a board with a talking clock that can travel time. Arale accidentally gets lost in ancient Japan with the Time Slipper. Senbei gathers Arale and Peasuke to come along to a trip on the Time Slipper to the prehistoric ages to catch a dinosaur. While failing to get a dinosaur they meet Peasuke's prehistoric ancestor who gives them a rare egg in exchange for Senbei's lighter. When they return to the present the egg hatches and a strange angel like baby creature comes from the egg. (Source: Wikipedia)