As part of the national schools fundraising event, Red, White and Blue Day, which takes place each October, children are being asked to design a Christmas card to mark the centenary of WWI.
Schools who register to take part in RWBDay2014 can submit entries until 28 February. Winning entries will see their pictures turned into real Christmas cards which will raise money for The Royal Air Force Benevolent Fund, ABF The Soldiers' Charity, and the Royal Navy and Royal Marines Charity.
Patty Wallis, from Red, White and Blue Day, said: "As part of RWBDay14 the three national military charities have decided to run a competition to design a card, which will be used by us for Christmas 2014.
"This year, as we look to commemorate the start of WWI, we are looking for a design that reflects this period in our history. During Christmas Day 1914 there was a temporary truce between British and German soldiers, when carols were sung in the trenches and a football match took place. Designs could be about the home front as well as the front line."
"As well as a creative competition with a lovely prize, it's an opportunity to think about WWI and the sacrifices made by our Armed Forces."
Information about the competition, including the dedicated template which must be used to submit designs, can be found on the website www.redwhiteblueday.co.uk along with the terms and conditions.
Pupils from schools that have signed up to take part in RWBDay14 are invited to take part in the competition. All entries must be received by 5pm Friday 28 February 2014.