We planned a short trip to the Efteling Amusement Park and stayed at the Hotel de Kroon last August. It was a really relaxing trip, even with 4 children. Our journey via Eurostar was effortless and fairly quick. The Hotel was comfortable and welcoming and a VERY quick walk to the amusement park. We visited four of the local restaurants for dinner which were all reasonably pried and on the last day hired some bikes locally and rode through the nearby Loonse en Drunense Duinen National Park which was the highlight of our trip. Unlike London, bikes rule the road in Holland, so the children were very safe.
