Mix together boiling water and gelatin. Stir for 3 minutes or until completely dissolved. Add cold water and continue to stir for 2 minutes until combined well. Pour into 9x13 pan and refrigerate for 4 hours or overnight.
6.8 oz green gelatin, 2 cup boiling water, 2 cup cold water
Use a fork to "shred" or break apart the gelatin into small pieces. Place into a large pitcher and carefully add lemon lime soda. Mixture will bubble and fizz, which makes for some fun goblin goo!