Movies can create a safe space for conversation, especially for families. It may be easier -- or more accessible -- for children to talk about what little Nemo (Finding Nemo) or Simba (The Lion King) is going through than what they themselves are going through. In fact, they may well not understand what they are going through and what the future holds, and it can be very comforting -- and revealing -- to talk about the feelings and the journey of a fictional character. In contrary, if the loss and death is not explained and process it can create long lasting trauma and effect of their adulthood.
Movies can be a very educational tool for schools, but the same applies to your homes.
Note: Pure adult grieving list is more expended, separated list