The project was initiated by the Labour, Pension System, Family Affairs and Social Policy Ministry and the Society for Psychological Assistance with support from UNICEF, UNICEF said on Friday.
Mobile teams will give priority to foster families, notably those whose homes have been damaged, and at-risk families included in social welfare programmes.
There are 49 foster families in Sisak-Moslavina County and 32 of them live in the areas hit by the earthquake.
Those families care for 125 foster children, and 82 live in Sisak, Petrinja and Glina.
Marina Ajduković of the Society for Psychological Assistance said that in situations such as natural disasters it was important to provide psychosocial support to children and young people and their families so as to reduce their anxiety, fear and mental suffering.
Around 50% of children exhibit various anxiety-related symptoms even six months after a traumatic event and even though most children gradually recover after an earthquake, 25-30% of them exhibit chronic or prolonged symptoms of depression and/or anxiety, she warned.
In cooperation with its partners on the ground, UNICEF will organise space and places for play and psychosocial support for children temporarily accommodated in container settlements and shelters.