Oh my god they are the most genetically gifted family in the world! Hunky actor Brad Pitt and his gorgeous partner Actress Angelina spent a fun day sightseeing with four of their the beautiful Maddox, 8, Pax, 6, Zahara, 5, and Shiloh, 3 1/2  and the cutest babies in the world Knox and Vivienne 19 months old in Venice, Italy on Tuesday