Boil 1 cup of water in a small saucepan, then stir in the gelatin for a few minutes until fully dissolved.
Stir in 1 cup of cold water. Pour the mixture into a bowl and refrigerate it for 1 ½ hours to firm only slightly.
Insert a jelly bean into a grape where it came off the vine.
Insert the grape into the lychee to form the “eyeballs”.
Add a little gelatin mixture to the bottom of the cup, then add an eyeball.
Repeat this with 2 more eyeballs and gelatin. The total eyeballs and gelatin should be divided between 4 Halloween Jello cups.
Refrigerate the assembled eyeball Jello cups for 2 ½ – 3 hours to allow the gelatin to set fully.