Saw these on youtube and knew I had to make them. It takes a bunch of jello, but the end was worth it. Everyone at the block party I took them to kept chatting them up the entire night. People were fascinated by them. I was mean and wouldn't tell them the secret of the blue at the top, LOL. But here's the secret. You layer them upside down. Start with the blue as a full base and when it is set cut it into strips, and then layer the red and white over it.
But here's where I found them at, https://www.youtube.com/watch?v=029MeniEifU They are so fun! Taste is like a dumb gelatin jiggler, but it's okay enough. The novelty is good enough to make the taste.