At a seminar several years ago, a friend, Nancy set-up the empty tomb she used with little ones at her church for demonstration in the preschool workshop.
When the children went to look inside the empty tomb they would find an angel (a very large doll dressed as an angel - with a flashlight lit under her so she glowed).
She said the children were captivated by the whole experience.
Large fridge box covered by beige bed sheet, in front large piece of cardboard painted to look like a rocky hill, both box and hill have a entrance hole cut into them. Then a piece of cardboard, the rock, that can be rolled to the side to reveal the entrance. Added artificial grass rug and fake plants.