Exactly a century ago King George V and Queen Mary officially opened the new Royal Hospital for Sick Children in Glasgow.
And to celebrate the milestone, Yorkhill Children's Charity organised a full day of fun, entertainment and parties.
Entertainers - including clowns, characters and magicians - visited every ward and department to bring a party atmosphere to the patients and families.
Every child will also be invited to write a message for a special time capsule which will be buried on the site of the New Children's Hospital, due to open next summer.
The celebrations continued into the evening with performances from The X Factor finalist and Yorkhill Children's Charity ambassador Nicolas McDonald and boy-band, Rewind.
Kirsten Sinclair, head of fundraising, said: "Yorkhill Children's Charity is thrilled to be part of the celebrations as part of our commitment to making the hospital experience more enjoyable for our young patients."
In 1914, a public appeal raised almost £140,000 to open the hospital on its current site at Yorkhill in Glasgow.