Complete then print this form and mail to Wonder Works at 6445 West North Ave, Oak Park, IL 60302. You may also drop it off on your next visit to the museum. Unless otherwise notified, your registration will automatically enroll your child in your first selected class. Second-choice class selections will receive confirmation. Refunds for cancelled classes must be requested prior to the end of the first week of the semester. For questions or concerns, please call us at 708.383.4815.