You might try making resurrection rolls. You can find the recipe online. Actually, there are two forms of making this, and one is a bit messier than the other. Basically it means taking refrigerator crescent rolls and marshmallows and some butter/margarine then some cinnamon and sugar. Have the kids watch you make it and explain to them what each part means. The marshmallows represent Jesus, the butter/margarine represent the oil he was anointed with once he was dead and the cinnamon and sugar represent the spices he was anointed with before he was put in the grave. I suggest you take the time to wash you hand a bit once you have put a marshmallow with each crescent roll bit to get any butter off your fingers. Then, you enclose each marshmallow with a crescent to represent him being put in the tomb. I can’t remember right off what the oven temperature should be, I’m thinking around 350 to 375. Bake them until they are starting to brown, again I’m not sure here, but I think it’s something like 15-20 minutes. But start checking on them after 10. Let them cool before eating. The marshmallow will have melted, leaving you with an empty “tomb.”
I almost forgot to add, after washing your hands, then take each one and bring the corners to meet on the top and then pinch them to sick together. I didn’t wash my hands before doing this, and the butter made it impossible to get a good “seal” on the edges.