silicon moldsI used this alphabet tray and lip tray
Kool-Aid packet of same flavor for a more intense flavor
In a glass measuring cup, start with 2/3 cup cold water. Slowly pour in your unflavored gelatin while stirring briskly so the gelatin doesn't clump together. Once the gelatin is poured, add your Jell-o packets while, again, continuing to stir the mixture. Allow the mixture to sit for 5-10 minutes until it starts to thicken. It will kind of be the consistency of jelly once it has set up a bit.
Boil some water in a pot. Bring the water down to a simmer and place the glass measuring cup in the water. I found that it was really easy to burn the mixture when it was poured directly into a pan, so doing it this way protects the mixture and allows it to heat up slowly. Let the mixture warm and thin out over about 5 minutes (stirring often) until it's much thinner and more liquid-y (it should be more like a syrup).
Remove the measuring cup and pour the liquid into your molds (use a pot holder if the handle is too warm). Place the gummies in the fridge. They should be set in about 20 minutes. Gently stretch the silicon mold in opposite directions around the gummy before pushing the mold inside out to remove.
Now you can either leave your gummies plain, or you can mix together a little citric acid into sugar and dip the gummies into that for a sour gummy twist. For some reason the sour sugar will eventually start to melt on top of the gummy. So I would dip them right before you eat them.
If the flavor of the Jell-o isn't intense enough for you, add a small Kool-Aid packet in a similar flavor when you add the Jell-o to the mixture. Keep the gummies in an airtight container in the fridge and they should last for up to a week.