Hi, we visited Ameland. Very nice indeed. Boat trip was really interesting with the tides and all. It is mainly biking, beach, walking etc.... I don't think you want to be on any of the islands when it rains, especially with kids. The mainland offers plenty of things to do for kids when it rains. I would suggest staying on the mainland and visit one of the islands as a day trip. We rented a house (Golf Hildenberg, house: Roegte 1) in Appelscha in the province of Friesland. We did lots of things from there, incl. biking in the national park Drents-Friese Wold, Seal Rehabilitation Centre in Pieterburen, swimming pool next to the golf, mini-golf in the area, somewhat outside the village a theme park for youngsters "Duinenzathe". The museum in Assen. We visited Giethoorn. Lots of things to do. Hope you have a nice vacation.