The Northwest Railway Museum is a great place to take your kids to on sunday afternoon. It is located in old downtown snoqualmie and is the olders railroad station in washington. They have lots of old rail cars, specialty cars, etc. And various displays. You can purchase tickets for a 25 minute roundtrip rail ride trip to snoqualmie falls. In the summer they usually have a big Thomas the Train rides, which is great for any child that loves Thomas the Train.