The Star and Rocket Bath Sprudel® each fizz for about 3 minutes, producing a white foamy layer on the surface of the bathwater. At the bottom of the rocket, 5 colour streaks of the rainbow (Red, Orange, Yellow, Turquoise and Blue) blast out creating a colourful, foamy rainbow on top of the bathwater.
In turn, the same colour streaks shoot from the star, one from each point. Lastly, a cute space-themed sponge character emerges.