Accessible NEMO Science Museum in Amsterdam
The NEMO Science Museum in Amsterdam is a science museum aimed at children (so for "wheelchair accessible" read "pushchair accessible"). Kids will absolutely love it here.
However, if the noise of children excitedly screaming with joy is a problem for you, then maybe it's best to skip the NEMO Science Museum altogether when you're visiting Amsterdam (the National Maritime Museum, also wheelchair accessible, and also on this same route from Amsterdam Centraal, is very near).
At the very minimum, expect to spend 2-3 hours visiting the NEMO Science Centre (although some people have spent all day here - and have visited just one floor!).
There are five floors to the sloping Amsterdam NEMO Science Centre building. All floors, with the exception of the rooftop Energetica open-air exhibition, are wheelchair accessible.
Because the roof slopes to mimic the shape of a boat, there are numerous steps up to the Energetica exhibition. However, the terrace at the foot of these steps, and which has the most amazing views over central Amsterdam, is completely wheelchair accessible.