After one of her attempts, Mrs. Trump initiated a high five with one of the veterans - known as a Chelsea pensioner - after he gave her effort the thumbs up.
She opted for less declarative fashion statements for her United Kingdom visit, wearing a nude dress by Roland Mouret on the Stansted runway, and a Grecian-style gown in pale yellow chiffon by J Mendel, another French designer, for the dinner at Blenheim Palace.
The First Lady joked and laughed with the youngsters as she made a visit to the Royal Chelsea Hospital, before trying her hand at bowls with Philip May.
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She paired the pricey piece with a pair of patent nude heels for her morning engagement alongside Philip May while their spouses spend the morning together.
The First Lady then joined the children and pensioners in the garden and enjoyed a game of bowls - a British form of lawn bowling.
Her famous brunette locks were blow-dried to perfection framing her face where she opted for a dark smoky eye.
The pair had met for the first time on Thursday evening during a black-tie dinner at Blenheim Palace, hosted by Theresa May to welcome the Trumps on their first official visit to the UK.
Mr and Mrs Trump will later reunite to meet the Queen at Windsor Castle.
Mrs Trump was greeted by Mr May as she arrived at the historic address in a police-escorted convoy.
Trump was warmly greeted by May as she stepped out of her vehicle, before meeting Lt Col Nicky Mott, the hospital's chief executive, Gary Lashko, and the uniformed Chelsea pensioners John Riley, Alan Collins and Marjorie Cole.
"Chelsea Pensioners" are residents at the Royal Hospital, which is a retirement home for former members of Britain's army where "any former soldier of the British Army over the age of 65, who is facing spending their advanced years alone, can apply for residence as an In-Pensioner", according to the Royal Hospital.
Mrs Trump helped children make poppies - red paper badges sold annually in the United Kingdom to mark Armistice Day (November 11th) with the proceeds going to the veterans' charity, the Royal British Legion.