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Welcome! - The holidays are a really big deal at the White House, but the staff can't create such splendor without the help of 106 volunteers who come from all over the nation to pitch in, including 30 who spent about 350 hours creating the intricate designs of the East Wing Hallway column covers. Approximately 65,000 people are expected to visit the White House to admire their work. (Photo: UPI/Kevin Dietsch /LANDOV)

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Holidays Are a Way to Say Thank You - This year's theme is "A Children's Winter Wonderland." Some of the decorations are tributes to members of the Armed Forces and their families and on Dec. 3, First Lady Michelle Obama gave them the first look at the White House's decked halls. "The holidays are a chance for us to show what our country is grateful for this holiday season and that's really all of you, the military families who serve our nation proudly and give us all so much," she said. (Photo: AP Photo/Evan Vucci)

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East Visitor Entrance - The East Visitor Entrance is a welcoming point for visitors as they begin their tour.  (Photo: AP Photo/Evan Vucci)

Photo By Photo: AP Photo/Evan Vucci

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Trees Galore - There are 25 decorated trees in the White House, but this is the Christmas tree that the first lady and her daughters received to kick off the start of the festivities. (Photo: UPI/Kevin Dietsch /LANDOV)

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Let's Go Digital - For the first time, the White House hosted a 3D-printed ornament challenge to highlight the Maker Movement and the way that tools and technologies like 3D printing enable more people to turn their ideas into reality.(Photo: UPI/Kevin Dietsch /LANDOV)

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Christmas in 3D - This 3D-printed ornament is hung on a Christmas tree in the Red Room of the White House. (Photo: Alex Wong/Getty Images)

Photo By Photo: Alex Wong/Getty Images

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East Room - The East Room features dioramas from paper cut-outs of winter scenes created by artist Jen Lang, a folk art carousel deer and 3D paper cutouts made from re-purposed books that serve as ornaments. It is the largest room in the White House.(Photo: UPI/Kevin Dietsch /LANDOV)

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Make a Holiday Wish! - (Photo: UPI/Kevin Dietsch /LANDOV)

Photo By Photo: UPI/Kevin Dietsch /LANDOV

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Cookie Time - The first lady helped military children decorate gingerbread cookies at the State Dining Room on Dec. 3.(Photo: Alex Wong/Getty Images)

Photo By Photo: Alex Wong/Getty Images

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The Official White House Christmas Ornament - (Photo: UPI/Kevin Dietsch /LANDOV)

Photo By Photo: UPI/Kevin Dietsch /LANDOV

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It Can See You! - An interactive installation that visualizes visitors in a snowscape projected on the wall with live movement is seen at the East Garden Room. (Photo: Alex Wong/Getty Images)

Photo By Photo: Alex Wong/Getty Images

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Red Room - The Red Room features 8-foot trees and wreaths in each window. Photo: UPI/Kevin Dietsch /LANDOV)

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Vermeill Room - The Vermeill Room features two dress-form mannequins with one-of-a-kind skirts with evergreen adornments and frosted embellishments. (Photo: EPA/SHAWN THEW /LANDOV)

Photo By Photo: EPA/SHAWN THEW /LANDOV

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The Library - In the library, which holds more than 2,700 books, hand-painted globes sit on the center table to remind visitors that those they care for are always near when held in their hearts. (Photo: UPI/Kevin Dietsch /LANDOV)

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Green Room - A winter garden look was the inspiration for the Green Room, an assortment of faux berries, gold pine cones and wide burgundy ribbon decorating two 8-foot trees.  (Photo: EPA/SHAWN THEW /LANDOV)

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China Room - The China Room tree is almost good enough to eat. Its decorations include a gingerbread garland.(Photo: UPI/Kevin Dietsch /LANDOV)

Photo By Photo: UPI/Kevin Dietsch /LANDOV

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Every Hall Decked - Every inch of the White House gets decorated — including the basement, as seen here.(Photo: UPI/Kevin Dietsch /LANDOV)

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East Entrance Landing - This area is dedicated to honoring military members, their families and the fallen. There is a traditional post office mailbox for visitors to send holiday greetings to service members overseas. (Photo: UPI/Kevin Dietsch /LANDOV)

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Greetings From Sunny - Or is that Bo? (Photo: UPI/Kevin Dietsch /LANDOV)

Photo By Photo: UPI/Kevin Dietsch /LANDOV

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Let It Snow! -   (Photo: UPI/Kevin Dietsch /LANDOV)

Photo By Photo: UPI/Kevin Dietsch /LANDOV

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Cross Hall - Holiday decorations and Christmas trees adorn Cross Hall at the White House. (Photo: Alex Wong/Getty Images)

Photo By Photo: Alex Wong/Getty Images

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A Gingerbread White House - Bo and Sunny replicas enjoy the view outside a 420-pound gingerbread house.(Photo: AP Photo/Evan Vucci)

Photo By Photo: AP Photo/Evan Vucci

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State Dining Room - The State Dining Room trees stand 14-feet tall and are decorated with vintage Union Pacific toy train pieces. Volunteers made the ornaments on the mantel that resemble Scrabble pieces that spell out "winter wonderland." (Photo: AP Photo/Evan Vucci)

Photo By Photo: AP Photo/Evan Vucci

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A Military Tribute - This is one of many ornaments designed to honor the service of members of the military and their families. (Photo: AP Photo/Evan Vucci)

Photo By Photo: AP Photo/Evan Vucci

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Happy Holidays, Everyone! -  (Photo: Alex Wong/Getty Images)