The Theoi Project website is a very good resource -- bookmark it if you have more Greek & Roman projects coming up .....
Ares and Aphrodite had quite a few children -- this list is not comprehensive mainly because the ancient sources do not always agree.
) DIVINE OFFSPRING
ANTEROS - The god of reciprocal (or some say, unrequited) love was a son of Ares and Aphrodite.
DEIMOS - The god of fear was a son of Ares and Aphrodite.
EROS - The winged boy god of love was a son of Aphrodite and her constant companion. (Some say the father was Ares, others that she was born pregnant with the child).
HARMONIA The goddess of harmony (marital and civic) was a daughter of Ares and Aphrodite, born of their adulterous union.
PHOBOS The god of panic was a son of Ares and Aphrodite
