1Place new (clean and unused) 6-cup capacity fishbowl on cookie sheet.
2Place gelatin in large bowl. Add hot water; stir until completely dissolved. Add cold water; stir until well combined. Pour gelatin mixture into fishbowl. Refrigerate until set, about 2 to 4 hours.
3Insert butter knife into set gelatin about 1 1/2 inches from edge of bowl; make slit large enough for 1 gummy eyeball to pass through. Press gummy eyeball to bottom of bowl with finger or butter knife. Repeat process around edge of bowl with remaining gummy eyeballs.
4Top gelatin with whipped topping. Refrigerate until serving time.