Just across from the Lincoln Memorial is the National Academy of Sciences.  On the grounds in the front of the building is a sculpture of Albert Einstein.  It is a great sculpture since it is quite sizable and impressive yet is in a style that is very relaxed.  It gets a few visitors at a time but isn’t very busy so is a nice distraction from the business of the rest of the Mall.  It is also just the right size to encourage you to sit in his lap.  I include a picture of Chris doing just that so you can gauge the scale.