Come down to the Peggy Notebaert Nature Museum as it celebrates its 10th anniverary with 10 free days filled with special programming.  From October 23 - November 1 admission to the Nature Museum is free!  Take the Family to see Videos shot by the National Geographic Crittercam in The World Through Animal Eyes exhibit.  Get up close to exotic butterflies as they sit on your shoulder or perch on your arms in the Judy Istock Butterfly Haven.  Engage in a bit of waterplay while exploring the dynamics of rivers in the Riverworks display.  These are just a few examples of the variety of learning experiences you can enjoy with your family for free during the Peggy Notebaert Nature Museum's 10th Anniversary celebration.  The Museum is open Monday through Friday from 9:00am to 4:30pm and Saturday and Sunday 10:00am to 5:00pm.  It's located at  2430 N. Cannon Drive in Chicago, near Lincoln Park.