Go online to book canal tours and tickets for the science museum in advance.
The canal boat dock and the NEMO Science Museum are both located near Amsterdam Central Train Station. It is also possible to walk between the two locations. Strollers are a challenge—we used one, but it was difficult to maneuver around town and through the museum. And we had to leave the stroller on the boat dock during the canal tour.
The NEMO Science Museum is busiest on weekends, holidays and when the weather is not suitable to be outside. It is the least crowded during the morning hours and after 2:30 p.m. The museum is open 7 days a week from April to August. It is closed on Sundays and Mondays from September to March. The museum is also closed on Kings Day (April 27) but is open on all other public holidays.
Canal tours, especially on an open boat, will be quite cold in the winter. The canal cruises are also weather dependent.
Children under 4 are free for both the canal tour and the museum. Online discounts are available for some canal cruises. The NEMO Science Museum rooftop is free to visit and it's possible to bring a picnic lunch. Discounts for the NEMO Science Museum can only be applied in person. There are also discounts available for certain card-holders, including I Amsterdam Pass and the Holland Pass.