Snap enough pictures on the field trip to have one for each child plus one extra, at least, to use as you model the project for the kids. Enlarge the model picture to 8 X 10 size and place it on the board. For this example let's say the picture is a close-up of a frog's head popping out of pond water that is littered with fallen leaves and sticks (real life example!). Tell the children you are looking for three to five statements about the picture, but not simply observations. Explain that you want their observations to extend to how they see the picture as a component of an ecosystem. In other words, if a child says, "There are fallen leaves on the surface of the water," encourage them to extend that statement by adding, "Which can be used for protection by water insects." If a child says, "There is a frog in the pond." Encourage them to suggest how the pond water is supporting aquatic life or how the frog is likely feeding off the insects living in the pond. This activity supports inferencing, which is great.