Why Bat is Always So Busy - Children's Picture Books, #30

The Great Power invented darkness because there was only light and the inhabitants of the Earth found it difficult to sleep in the light. The Great Power packaged the darkness in a box and assigned Bat to take it to the Moon. On the way to the Moon Bat stopped in the forest to rest and seek food and left the package of darkness next to a pathway. While Bat was away a curious mouse opened the package and the darkness escaped just as Bat returned.
In desperation Bat tried to capture the darkness but can he possibly do so before the Great Power discovers what he has done? A myth from Africa.