Tributes have been paid to four members of a family from Gloucestershire who were found dead in a disused quarry in Shropshire.
Ceri Fuller, 35, and his children Sam, Rebecca and Charlotte, from the Forest of Dean, were found dead in July.
Three close friends of Sam organised the memorial and led the tributes sharing their memories of the three siblings.
The event took place at Lakers School, Coleford - Sam's former school.
During the service a message of thanks was read out on behalf of the children's mother, Ruth Fuller.
The message said: "There are so many people I want to thank for their compassion and support.
"But today I want to thank you all for the parts you played in every smile my children ever had. There have been so many of those.
"I hope you all know how much they cared for the people in their lives, how glad they were for you all, how glad I am that they had you."
Balloons were released into the sky and candles were lit at a memorial on the school grounds.
A bench has also been placed in the school gardens near the pond and a tree has been planted in memory of the three siblings.
Speaking during the service, pupil Jack Cook said: "Sam, you are my one and only best friend, the one and only that I shall ever have. No-one can ever replace you, ever."
The four bodies were found at Poles Coppice at Pontesbury Hill, near Shrewsbury, on 16 July.
A post-mortem test revealed Mr Fuller, who was from Milkwall, Coleford, died "from multiple injuries consistent with falling from a height".
His son Sam, 12, and daughters Rebecca, eight, and Charlotte, seven, all died from stab injuries. A knife was recovered from the scene.
Donations at the memorial event will be given to childhood bereavement charity Winston's Wish and mental health charity Mind.