Take the free ferry!
To get in the north of Amsterdam you can take the free ferry behind the Centraal Station. Take the one into the direction of the NDSM Wharf. Once this was a shipyard and now the place attracts many creative entrepreneurs, music channel MTV for example.
Visit at the NDSM Wharf the indoor skate park or have lunch in one of the restaurants with view over the river. Or hop on the ‘Pannenkoekenboot´ for a cruise. On this boat you can eat as many Dutch pancakes as you can handle. The Pancake Boat is docked next to the NDSM Wharf ferry stop.