Kids ages 8 and up and adults can sharpen their bird watching skills. A bird guide and binoculars are recommended. In offers the class Hide and Seek from 4 to 5 p.m. Kids in grades 1 to 6 can discover how aquatic animals use camouflage. Emily Oaks Nature Center hosts a Spring Sing and S'More Campfire from 8 to 9 p.m. for all ages. 4650 N. Brummel, Skokie.
Admission is charged.
Register by May 11. Flavors of Greece Indoor Festival is held at Kane County Fairgrounds, Main St. and Randall Rd. Chicago Woodson Regional Library offers a Story Hour at 11 a.m. for kids in grade 2 and under at 9525 S. Halsted St., Chicago. The Round Lake Area Park District Prairie Grass Nature Museum presents its 6th Annual Heritage Festival from 10 a.m. to 4 p.m., rain or shine. This free, living history event will offer storytellers, crafters, a children's trading post, games, children's crafts and more.