Good Old Texture! Always a great way to get new photographers up close and personal with their subjects! With younger kids I ask them to feel things around them and describe the texture. Lumpy, bumpy, scratchy, etc. We can make a list. If something is too smooth it probably won’t make a good texture picture. A successful texture picture is one that you can almost feel by looking at it.
With the iPad this is a good time to explain tap to focus. When you tap on the screen at your subject, the camera will make it super focused and you can see all that fabulous detail and texture. With a regular camera if there is a macro setting this would be a good time to turn it on.