So its a 6.5 hour flight from Newark (NJ) to Amsterdam and too good an opportunity not to fly over and spend time with our Dutch family. We rented one off the Cube houses - Kijk Kubus - in Rotterdam through airbnb. It was rather expensive and not very practical (no air conditioning, so in a week with a european heat wave, very illogical) they are an absolute Dutch landmark that is a the top of every tourist destination. kind of fun living in a tourist museum!
We had 6 days in Rotterdam, Richard combined this with a work trip to look at catalyst equipment in Alkmeer, so the kids and I had time to spend with the family.