What I love about the Chicago Park District: classes are generally inexpensive and you can register online.
What I hate about the Chicago Park District: you have to watch the countdown ticker at 9 a.m. on the day of online registration and be quick with the mouse buttons and keyboard.
That said, I got everyone in our family into our desired classes for the winter session. The Boy is taking gymnastics at Peterson Park Gymnastics Center. The Girl is taking a similar class at the same time. The Tot and I are following in his older brother's footsteps and taking a parent/caregiver and tot class at Independence Park. I'm reprising my Thursday wheel pottery class at Athletic Field Park. And I even got The Dad into the act -- he's taking a woodworking class at Brands Park.