The Lucy Lambert Memorial Cup will kick-off on the astroturf at Selkirk Rugby Club on Saturday, May 19, at 10am.
Everyone is invited to take part in the event with all funds raised being donated to the Sick Kids Foundation, which supports the work of the Royal Hospital for Sick Children in Edinburgh.
The family fun day will also include a children's football competition, bouncy castle, face painting, and raffle - to win a Celtic strip signed by the squad which reached the final of the UEFA Cup in 2003.
Tom Lambert, who works for local energy supplier Spark Energy, has organised the match in memory of his niece who died last August.
He said: "With permission from my brother and his wife I decided to put on a football tournament and family day around Lucy's birthday (May 10) to get the support of the community to help raise as much money as we can for the amazing people at the Edinburgh Sick Kids Foundation.
"The Celtic top was kindly donated by Jimmy Shaw, who paid a lot of money at an auction for it and asked if he could donate the top so we could raffle it.
And he added: "My work, Spark Energy, has donated £500 to the fund, so hopefully the weather will be great and a lot of people will come along to support us on the day."
Food and drink will be available throughout the day and, after the tournament, a free buffet will be put on at the Station Bar in Selkirk when the winner of the Celtic top will be drawn - just before the Champions League final kicks-off.
Entry to the Lucy Lambert Memorial Cup is priced £10 donation per player with organisers inviting teams of seven. For more details email: email@example.com
Alternatively, if you can't make it along and you wish to donate, log on to the following website - www.justgiving.com/Tom-Lambert
Tom's pal Liam Scott, who is helping to organise the event, said: "This is a day for making a difference to children's lives by raising as much money as we can to provide better support for families, more training for nurses, new equipment and most importantly awareness and research into childhood illnesses.
"The tournament was created to raise awareness of the incredible work that the doctors and nurses do day in day out, while making it fun too."