What you need,
large container or round patch of garden
small flower pot
Using potting soil, bury the small flower pot for the tomb, place the rock next to it, & make the crosses with twigs and twine.
Sprinkle grass seed generously on top of dirt, keep moistened using a spray water bottle. Spritz it several times a day. Set it in a warm sunny location. Sprouts in 7-10 days so plan ahead.
The tomb is EMPTY! He is Risen!