This is also available in Hanoi via Hanoikids
http://hanoikids.org/Me and my GF did this lasy year, 2 female students took us around a couple of museums in Hanoi and then to a local place for noodle soup and I think we finished the day with an egg-coffee, from a cafe that was situated through the back of a clothes store and upstairs to a small smoky room that has been there for year,s and was where the egg coffee was invented.
I almost forgot to mention, one of the students helped me get a Viet simcard for my phone also.
We had a nice day and paid for the girls' lunch and coffee.