Directions to Spring Hill Country Club [Back] View Larger Map Please call 541.924.9480 with any questions.   To make a tax-deductible donation, please visit Sundborn Children's House Donations Thank you for your support! © 2009 Montessori Foundation of Washington dba Sundborn Children's House. All Rights Reserved. Page Updated on Friday, January 2, 2009 6:28 PM The Sundborn Children's House is the only school operated by the Montessori Foundation of Washington, a nonprofit IRS 501(c)(3) Foundation. The Montessori Foundation of Washington does not discriminate in matters of employment, recruitment, admission, or the administration of any of its programs on the basis of race, creed, national or ethnic origin or gender.