Bring the multi-vitamin juice to the boil, then remove it from the hob and add 1 sachet of the pudding powder, stirring constantly with a whisk, and stir for 1 minute. Rinse small silicone molds or glasses with cold water and distribute the pudding evenly on the molds.
Prepare the 2nd package of pudding powder with 400 ml milk according to the instructions on the package and let cool a little while stirring. Now stir in the natural yoghurt. Spread this pudding on top of the multivitamin pudding and refrigerate for at least 4 hours.
Peel the kiwis, puree them with a hand blender and add sugar to taste. Turn the pudding out of the molds or glasses and serve with the kiwi puree.