First lady Melania Trump leaves president behind to visit with sick children at hospital

For the second day in a row, first lady Melania Trump visited with sick children at a hospital while her husband, President Donald Trump, met with world leaders in Brussels during the first couple's first foreign trip of the Trump administration.

On Thursday, the U.S. first lady traveled to Queen Fabiola University Hospital, where President Trump attends a NATO leaders summit, smiling brightly as she snapped selfies and made artwork flowers with sick patients in Belgium.

See the first lady's interactions with children:

She shared a touching message earlier on Thursday when she learned that a sick boy she'd visited with at the Bambino Gesu Children's Hospital in Rome the day before had found out he would receive the heart transplant he needed.

"Upon landing in Belgium, I learned a young boy and his family who had been waiting for a heart transplant was informed that the hospital has found a donor," the first lady said in the statement. "I read a book and held hands with this special little one just a few hours ago, and now my own heart is filled with joy over this news."

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Melania Trump has visited three hospitals during her visit, including the Hadassah Ein Kerem hospital in Jerusalem on Monday, but has also made headlines for her interactions with the president during the trip.

Social media erupted on Monday when a video captured on the tarmac and Tel Aviv appeared to capture the first lady seem to swat President Trump's hand away from her as they deboarded Air Force One.

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On Tuesday, another interaction raised eyebrows, as the first lady seemed to reject her husband's attempt to hold her hand, leading him to reach for her rear end.

See how the first lady interacts with her husband during this trip: