Some people, particularly those under four feet tall, tire of Picasso and Piranesi, even with rooms of their masterpieces left to cover. Fortunately, the new East Building is full of diversions:

Challenge your children to a hexagon search. Some of the elevators are hexagonal. The two spiral staircases from the Upper Level to the Tower have hexagonal skylights. The galleries themselves in the East and North Towers are hexagonal. And, if you view the triangular floor tiles in groups, eureka! Hexagons!

If you happen to have an eighteen-foot package to carry, you will want to know about the South Tower elevator, the largest in the building - in fact, the largest in almost any building. Some of its sides are removable to expand its space. And it can carry 18,000 pounds. See if your children can figure out how many of them could pile into it.

Don't tell your children. The people-mover, that compelling conveyor belt between the old and new buildings, bounces.

Revive the art of promenading. The building is a web of bridges, balconies and grand staircases, its central courtyard designed for seeing and being seen.It could become Washington's all-weather town square.