The Duchess of Cambridge has lent her support to a campaign to raise awareness about the 49,000 children in the UK living with life-limiting or life-threatening conditions.
Kate said "every moment is precious" for families who care for seriously ill children as she praised the work of hospices.
In a message of support to mark the start of Children's Hospice Week today, she said : "For families of children with life-limiting conditions, every moment is precious and every memory needs to be cherished and celebrated.
"Children's hospices strive to create happy moments in the most difficult times any family could face. I hope you will join me in supporting Children's Hospice Week and work to make every moment count for all of our families."
Kate, who gave birth at the start of the month to Princess Charlotte, is the Royal Patron of East Anglia's Children's Hospices.
Children's charity Together for Short Lives, which is leading Children's Hospice Week, is appealing to the public to share their special memories on social media using the hashtag #momentscount