The NW has a number of children's museums that appeal to the mind and spirit of the younger set. The Seattle Children's Museum is a great example. Located on the ground floor of the Seattle Center House, the Children's Museum houses a number of exhibits that expose children to the arts, sciences, nature, and world culture. It's a specialized museum. There is a little for the really young children and not much for older children. But a membership is ideal when your children hit that 4-8 year range. The gift shop is fun and available to outside visitors.