Pisces (gray blue)
Taurus (green, girl)
Capricorn (green, boy)
Scorpio (black)
Virgo (purple!)
Cancer (coral)
Sagittarius (red, girl
Libra (gray)
Aries (red, boy)
Leo (amber)
Aquarius (blue)
Gemini (dark brown)

All girls (except for Libra... sorry! I forgot) have necklaces or some sort of jewelry with sign. All boys have a tattoo somewhere of heir sign.

Time took: 2 days.