How do we explain death to a three year old child? Specifically in the case of a death of a close relative.
We need to tell this child that Allah created us and we will live in this world for a time. During this time we try to be good to please Allah. And after our time finishes in this world we will go back to Allah, we will wait until all this world is finished, then Allah will gather all of us again. And all those who were good and obeyed Allah will unite again together and will enter the Heaven, the Jannah with each other. And in the Jannah they will never be separated again. Always together. So we ask Allah to re unite us with those whom we love in His Jannah.