Children Lost Father Due To Accident

I'm the aunt to the children.
My brother who is the children's father, loved his children with all his heart, he worked very hard to help support his 5 children. 
On November 22, 2016 he was at work when the truck he was loading backed over him and killed him instantly.
His Children will now have to struggle with the loss this Holiday season. The loss of the father they loved so dearly and the loss of the support from their father will be devastating to them. Any help for the children would be greatly appreciated. Thank you in advance