To make these artistic and beautiful jewel or rainbow jello shots first of all you have to mix boxes of Jell-o in different flavors/colors in separate bowls and let them cool and set. Then cut all the set jellos in cubes and gently mix them to create a rainbow of cubes in a tray. Dissolve some gelatin in hot water, mix it in a can of condense milk and let this mixture cool to room temperature. After that pour this condense milk and gelatin mixture over the colored jello cubes and put the tray in fridge to set well.
When the jello is set, take it out of the fridge, cut in cubes and enjoy. More details at intimate weddings.