We Made That shares a simple water density experiment that ends with this fun rainbow of colors in a glass. The colors stay separated for several days. Sugar, water, food coloring is all you need.
Rainbow Soap Foam Bubbles Sensory Play from Fun at Home with Kids - Just dish soap, water, and food coloring put in a mixer. Looks so fun!
Experimento para niños con pintura bicarbonato Más
Paper Plate Fish Craft – Rainbow Paper Circles (pair with children's book The Rainbow Fish by Marcus Pfister)