Point and Shoot: Digital Photography for the Preschool Set
Digital camera, or phone with camera.
While waiting for the doctor, toddlers get pretty bored. I found that bringing my digital camera (or phone) in and having my son take pictures of my funny faces, or having him pose with funny faces, helped the time go by more quickly. Short videos of him singing his favorite songs was also a big hit. No more worrying about him spinning out of control on the doctor's stool, or playing with every instrument he could get his hands on.