We stayed in this farm for 4 nights. We have two daughters, ages 10 and 15. There were a lot of toys for the younger (she liked so much this place that she would stay there all the day). We have used the available water bicycle (the place is completely surrounded by canals).
Every day the hostess (a really kind person) gave us a fresh bottle of milk of their cowshed, coffee and sugar were available in the room.
The farm is very near to Amsterdam (15Km) ; there's a P+R at about 15 minutes from the farm where you can leave the car and with 8 euros you have the park +tickets for public transports (for a maximum of 5 people, 2 travels of 1hour each ticket; the tram stop is nearby).
The room was large, with a small kitchen with all the necessaries. In the bathroom, there was a bathtub with hydromassage.
The conclusion is : simply wonderful, absolutely recommanded both for families and for people that love nature and quiet places, expecially after a day spent travelling, visiting...