This is such a great experience for the family. Our boys (age 7 and 9) were apprehensive at first but their drivers quickly settled them into it and they had a wonderful time. I always felt safe even though the traffic seemed chaotic, kudos to our drivers-Mary, Kien, Doanh and Minh.
We saw so much it's difficult to pick highlights but zipping through narrow streets barely wide enough for the bike to fit down, seeing the black market, having a beer on train street as the train passed, joining in a game of shuttlecock and calling into a locals house made it such a unique experience.
Evening meal at the hidden gem cafe was great too, a real taste of authentic cuisine.
If you only have time for one thing in Hanoi make it this, you won't be disappointed.