A busy park

Describe this scene in as much detail as you can.

In the picture

A city park on a sunny afternoon
A family having a picnic on a red blanket; a dog is trying to eat a sandwich
Two teenagers playing frisbee near a small pond
An older man feeding ducks from a wooden bench
An ice cream truck with a long line of children
Dark clouds starting to appear in the corner of the sky

Describe the scene to someone who cannot see it. Include as many details as you can. (Beta: the picture is described in text.) Preparation: 30s · Speaking: 60s.