Ducksters
Ducksters: History of Ancient Rome for Kids: Roman Gods and Mythology
Kids learn about the Gods and Mythology of Ancient Rome on this site. Taken from the Greeks, the Romans had gods such as Jupiter, Mars, Mercury, Neptune, and more.
Other
Poseidon: God of the Sea
The many mentions of Poseidon (Roman name "Neptune") in The Iliad and The Odyssey are detailed here.