Children were encouraged to help build a border wall mural during a government Halloween party, 'horrified' guests have told Yahoo.

The festivities were held last Monday for the families of executive-branch employees and took place in the Eisenhower Executive Office Building across from the White House.

According to the attendees, a station was set up where children could write their names on red sheets of paper designed to act as 'personalized' bricks in the border wall mural.

A photograph taken inside the office shows the red sheets of paper tacked up with cut-out letters reading 'Build The Wall' plastered through the middle.

A sign reading 'America First' can also be seen posted up in the building's hallway.

Children were encouraged to help build a border wall mural during a government Halloween party, 'horrified' guests have told Yahoo. A photograph taken inside the office shows the red sheets of paper tacked up with cut-out letters reading 'Build The Wall' plastered through the middle

Trump's promise for a wall along the southern border was one of signature 2016 campaign promises

Yahoo reports that many of the guests were workers in the Trump Administration.

One attendee who voiced their disapproval of the activity told the publication they 'wished to remain anonymous 'to avoid professional retaliation'.

The Eisenhower Executive Office Building is home to Vice President Mike Pence's ceremonial office, and he was present for the party.

According to the attendees, a station was set up where children could write their names on red sheets of paper designed to act as 'personalized' bricks in the border wall mural

However, a spokesperson said they were unaware of the wall mural, which was constructed on the building's ground floor.

The spokesperson said Pence spent much of the party building paper planes with children near his office on the second floor.

The White House did not respond to Yahoo's request for comment - but disturbed Democrats were more than happy to chime in.

The Eisenhower Executive Office Building is home to Vice President Mike Pence's ceremonial office, and he was present for the party

The festivities were held last Monday for the families of executive-branch employees and took place in the Eisenhower Executive Office Building across from the White House

'To the extent the wall is just a xenophobic symbol, this is obviously a gross thing to have children do,' said Obama administration employee Ben Rohrbaugh.

He couldn't help but take a dig at the lack of progress on Trump's border across the Southern border - which was a cornerstone promise of his 2016 campaign.

'To the extent it’s a representation of an actual wall on the southwest border, the kids have made nearly as much progress as the president has since 2017,' Rohrbaugh stated.

Meanwhile last Monday, President Trump and first lady Melania Trump handed out commemorative Halloween candy to trick-or-treaters in an unrelated party at the White House .

The couple opted not to dress in costume - with POTUS in a navy suit and FLOTUS in a belted coat with an autumn-colored patchwork design .

Elsewhere on Mondauy, President Trump and first lady Melania Trump handed out candy in front of a spookified White House