Hermes and the Cattle of Apollo
Hermes was known to be a cunning trickster, stealing things from the other gods and hiding them in unbelievable locations.
Back in the days when Hermes was still an infant, he left his cradle and started an adventure to Pieria, in Northern Greece. His aim was to steal the cattle from his half-brother Apollo.
Hermes discovered the herd of cattle soon. One by one, he started pulling the hoofs out of the cows' feet and re-attaching them in the reverse order. The same he did to his own sandals. Then he took the herd, which now appeared to be walking backwards and hid them herd inside a cave. Finally, he returned to his cave in Mount Cyllene in Arcadia.
Apollo soon found out that his heard was missing and started searching around. The traces he saw on his search were confusing and led the god to despair. Of course, because Apollo was the god of prophecy, he soon discovered that the thief was Hermes and he furiously went to Mount Cyllene to find him in his cave. Little Hermes was peacefully sleeping inside his cradle, but Apollo didn't bother- he grabbed the infant and took him up to Mount Olympus to be judged by their master Zeus, the king of the gods.
Before the eyes of Zeus, Hermes first denied everything, but in the end he had to confess. Zeus found the story quire amusing so he didn't punish Hermes, he only asked him to return the herd. Regretful of what he had done, Hermes then offered Apollo his lyre as a present. The lyre was a musical instrument Hermes had created all by himself out of the small of a tortoise.
To compensate Hermes for his kindness, Apollo returned the gesture by giving Hermes a golden rod to guide the herds. This moment created a strong friendship between Hermes and Apollo.