Prepare the grapes by removing from the stems, washing, and then drying.
Set out the jell-o mix (or mixes) in a small bowl (or bowls). Pour the soda in another small bowl.
Using a toothpick, piece halfway through a grape and then dip it all the way in the soda.
Remove and gently tap the grape on the side of the bowl and then roll it in the (dry) jell-o mix.
Place in the fridge to allow the gelatin to set up a bit, about 20-30 minutes.