Here’s a cute idea that could easily be turned to darker ends: Terrariums made of edible materials. Sprinkle Bakes did a tutorial for Etsy which uses chocolate cupcake “dirt,” candy rocks*, and succulents made from candy clay. It seems to me that you could make other objects from the same candy clay. Like, for instance, tombstones.

Little individualized graveyards would be a fun party favor, or you could make a large one in a glass compote as a table centerpiece. You could use chocolate cookie crumbs rather than cupcakes for the dirt if you prefer, and switch out the candy clay with fondant or gum paste (Craftsy has a good overview of the differences between them).

The tutorial features a plastic deer as an additional decoration, but there are plenty of spooky miniatures–such as vultures and snakes–that could be used instead. The terrarium could also be made more child-friendly by using a clear plastic container (a goblet would be neat) instead of glass.

*Because the tutorial was done for Etsy she links to them for the rocks, but they’re also available on Amazon.