The White House on Monday released a video of first lady Michelle ObamaMichelle LeVaughn Robinson ObamaMichelle Obama: We raise men to feel 'entitled' Michelle Obama: 'Don't tweet every thought' Michelle Obama, Prince Harry visit public school in Chicago MORE reading “'Twas the Night Before Christmas” to kids at the Children's National Medical Center.

The video was recorded during the first lady’s trip to the hospital on Dec. 18.

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First dog Bo sat on her lap in front of a Christmas tree next to a man dressed as Santa Claus as she read the famous children’s poem. Visiting the children's hospital has been a tradition for first ladies dating back to the 1950s.

The Obamas are vacationing in Hawaii, where the president worked out and played a round of golf on Monday morning with friends Mike Ramos, Greg Orme and Bobby Titcomb, according to a White House pool report.

The first lady spoke to children as part of NORAD's Santa-tracking project for about 30 minutes on Monday, according to a White House official.

--This report was originally published at 3:09 p.m. and last updated at 6:28 p.m.