updated 04/09/2010 AT 11:00 AM ET
•originally published 04/09/2010 AT 1:00 PM ET
Meet Benjamin Brady, world traveler.
Just 10 days after attending his aunt’s Brazilian wedding, Gisele Bündchen and Tom Brady’s son Benjamin celebrated his 4-month birthday with a family day out in Paris. Under warm skies, the trio, joined by Bündchen’s mother and sister, took off from their hotel for a private 90-minute lunchtime cruise along the Seine aboard a 72 ft. charter yacht. “Gisele carried Benjamin on board wrapped in a white blanket,” one onlooker told PEOPLE, adding, “The baby’s very pretty. He’s very active – looking everywhere.”
And he had a lot to see.
From Bastille the yacht sailed downriver beside Notre Dame, the Louvre, Concorde and moored beneath the Eiffel Tower. “Tom and Gisele and Benjamin were posing for family pictures, kissing the baby and each other,” the onlooker says. With lunch onboard prepared by chef Jean Pierre Vigato in a salon, the couple took turns holding Benjamin while they ate on the deck.