The boys were bored in the backyard, so I made a quick scavenger hunt list and handed my 6-year-old the camera. He and my 3-year-old took turns finding the things on the list and they ran around taking pictures. When they were done they showed me their pictures and we checked their list. They loved it and I love the pictures they took.
You could do a photo scavenger hunt any time of the year. Inside the house on a cold, rainy day, outside at the park or on a walk!