Prepare the watermelon and green apple jello separately according to instructions and set aside to cool in respective containers. Don't mix the jello, keep them separate.

Bring another 1 1/2 c. of water to a boil. While the water is heating, sprinkle 2 packets of unflavored gelatin over 1/2 c. of cold water. Allow to stand for about 4 minutes. When the water is boiling, pour 1 1/2 c. boiling water over the dissolved gelatin and stir to combine. Add the sweetened condensed milk and mix well. Allow to come to room temperature.

Cut the green and pink jello into cubes placing the green cubes on the bottom of the 9×13″ pan and the pink/red cubes on top. Pour the cooled milk mixture over the green and pink jello and make sure the colored jello is covered and isn't popping out of the white mixture too much.

Place the pan in the refrigerator and chill a few hours, if not overnight.

You can cut into squares or use a cookie cutter to cut into cute shapes for kids!