This 2006 image supplied by the New York Botanical Garden shows children watching trains at the garden's annual Holiday Train Show in the Bronx. (AP Photo/New York Botanical Garden, Joseph De Sciose)
Holiday train shows in botanical gardens
This November 2009 photo supplied by the U.S. Botanic Garden shows a 2-foot-tall replica of the White House made from plant material by designer Paul Busse for the U.S. Botanic Garden's 'Holiday Magic' show. The White House replica was originally made in 2007 but this year Busse added models of the Obama childrenís swing set and the White House vegetable garden.(AP Photo/Courtesy U.S. Botanic Garden)
Holiday train shows in botanical gardens
This 2008 photo supplied by Frederik Meijer Gardens shows a model train crossing tracks as it runs through the Victorian Garden, one of three indoor gardens that are part of the annual holiday Railway Garden exhibit at Frederik Meijir in Grand Rapids, Mich. (AP Photo/Frederik Meijer Gardens, William J. Hebert)
Holiday train shows in botanical gardens
This November 2009 photo supplied by The New York Botanical Garden shows a 20-square-foot replica of the original Pennsylvania Station, a 1910 building that was torn down in 1964. The model was designed from plant material by Paul Busse and is debuting in the Holiday Train Show this year at the garden in the Bronx. (AP Photo/The New York Botanical Garden)
Holiday train shows in botanical gardens
This November 2009 photo supplied by the Chicago Botanic Garden shows a model of the house in Chicago’s Kenwood neighborhood where the Obama family lived before moving into the White House. The 2-foot-tall model, made from plant material by Paul Busse, is new this year to the garden’s annual Wonderland Express holiday train show. (AP Photo/Chicago Botanic Garden)
Holiday train shows in botanical gardens
This November 2009 photo supplied by the Chicago Botanic Garden shows a model of the house in Chicago’s Kenwood neighborhood where the Obama family lived before moving into the White House. The 2-foot-tall model, made from plant material by Paul Busse, is new this year to the garden’s annual Wonderland Express holiday train show. (AP Photo/Chicago Botanic Garden)
Holiday train shows in botanical gardens
This 2005 image supplied by the New York Botanical Garden shows an oncoming model train with a Yankee baseball symbol on one of the cars at the garden's annual Holiday Train Show in the Bronx. (AP Photo/New York Botanic Garden, Muriel Weinerman)
Holiday train shows in botanical gardens
This Jan. 2, 2009 photo shows a train display with models of Cincinnati landmarks that is part of the annual Holiday Floral Show at the Krohn Conservatory in Cincinnati. (AP Photo/Gary Kessler)
Holiday train shows in botanical gardens
This 2008 photo supplied by the Chicago Botanic Garden shows visitors watching a train pass by a model of the Bahai House at the garden’s annual Wonderland Express holiday train show. (AP Photo/Chicago Botanic Garden, Robin Carlson)