Targeted to children six to 10, the exhibit has also been drawing a considerably older crowd.
More than 1,500 free interactive exhibits reportedly drew about 500,000 people to the event, which had over 75 performances.
Since its opening there Aug. 1, the exhibit drew 103,000 visitors, gallery officials said, more than twice the number of last year's visitors.
The exhibits in the Hall of Nature draw attention to how the nature surrounding us operates according to certain laws.
The exhibit immediately drew criticism from members of the Northern Cheyenne Tribe.
The NPG collection had grown so large that the exhibit drew its images almost entirely from the museum's own collection.
Ms. Webster said she hopes the current exhibit will draw new visitors.
The exhibit won two golden awards and drew the attention of important scholars, lapidaries and the general public.
Her selective yet comprehensive exhibit draws from more than two dozen private and public collections, among them many of the United States's most distinguished libraries.
Hand-built original bicycles of the 1860's were known as boneshakers - from which the exhibit draws its name.