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What you'll need

Apple cider (adjust the amount for the number of people you plan to serve; we suggest at least 1 gallon)
Five 1/2-cup containers (we used Pyrex glass dishes; other small containers or cups will also work)
Red and green food coloring
10 to 15 gummy worms
Punch bowl

Helpful Tip: Do steps 1 and 2 the day before serving the punch.

Pour apple cider into all 5 small dishes, stopping about 1/2 inch from the top. Add 2 drops of red and 1 drop of green food coloring to each dish and stir until the colors have blended.
Hang 2 or 3 gummy worms around the edge of each dish and place the dishes in the freezer. If you use more than 3 worms, the rotten apples won't float as well. Freeze until the rotten apples are solid.
Just before serving, slip the frozen wormy apples out of the dishes by setting them briefly in a few inches of warm water in your sink.
Float the rotten apples in a large punch bowl filled with untinted cider. For added creepiness, drape the gummy worms over the edges of your serving bowl.