If you have a spare day and are looking for a fun low key place, Efteling is about an hour outside of Amsterdam and even closer to Rotterdam. It is an amusement park, so they have plenty of attractions and slow rides that you can do with your young child. There is also a very large fairytail forest you can walk through. The park is actually very large, older than Disneyland, and it provides a unique glimpse into the life, food, and culture of the Netherlands. I have been to almost all of the Disney parks, but this is one of my absolute favorite amusement parks in the world.