Wibbly Wobbly Water Balloons By admin on November 23, 2012 in Craft activities, Kids Party Games Awesome fun today! I filled a normal size 9″ balloon with water, about 2 1/2 cups. The kids let it drop from knee height, then waist, then head. Comments were “it’s wibbly wobbly”, “it’s magical”. Guaranteed fun with the kids – go ahead and try it! balloon games, craft activities