7.5 miles, Full day
As a resident of Amsterdam, and a father of two children younger than 8, I wanted to create a guide to assist travelers visiting Amsterdam with children. I've included a mixture of indoor and outdoor activities, information about where to find decent food and toilets, and just a little bit of education and culture thrown in for good measure.
Amsterdam is a family-friendly city—you just need to know where to go.
I would suggest doing this tour by bicycle. The GPS location at the start of the tour is just outside the MacBike rental shop at Central Station. Depending on the age of your kids you can rent bikes with kids seats on them, bikes that the kids can ride themselves (I would only recommend this if they are at least 10 years old and good cyclists) or a bakfiets (a long bicycle with a box on the front where the children can sit). This MacBike location is open daily 9am-5:45pm. See pricing at http://www.macbike.nl/
You also can walk this tour, but walking will take much of the day so you will want to have strollers for the younger kids. If you do walk I recommend taking Tram No. 1 from the last point of interest back to Central Station (instructions on doing so are in the guide).
Finally, I suggest packing layers for the kids no matter what the weather looks like. The weather in Amsterdam can change from sunny to windy to wet in no time. Enjoy!