第 3 集: Senbei 介紹 Time Slipper，意外穿越至古代日本並展開史前冒險。

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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)