Employees of the Tulalip tribal government have been working at a new $28 million building since early this month, but they’ll open doors to the public on Saturday for a special grand opening ceremony. The ceremony, scheduled to begin at noon, is to be followed by tours of the building. Activities, including a bouncy house for children and snacks, will be available from 11 a.m. until 4 p.m. Lunch will be provided. All the events are open to the general public.