Because CALM is run by the families of children who have been diagnosed with cancer, all of its members have personal experience of the illness, and the strains cancer can put on family life.
There is a support network within CALM that can provide a listening ear to those families who need support.
Many families find emotional support through attending the social events held by CALM.
When a child or teenager is diagnosed with cancer, it can place a considerable financial strain on the family.
In the early days after diagnosis, the child may need to spend time receiving treatment at one of the specialist regional cancer hospitals.
These centres are based in places such as Bristol, London, Oxford and Birmingham.
While many of these locations provide family accommodation, the cost of travelling, parking and eating out can quickly add up.
CALM provides grants to families to help with expenses