The "if you want, eat them and if you don't leave them" does not make sense with today's lentils. Children will be delighted to eat them, if only for the novelty: they have pasta.
It cooks practically alone, in Thermomix, in very few steps and without the need to soak them previously. In the video you will see that they are very easy to do.
They also carry vegetables (carrot, onion and celery) that we can even chop in the glass itself before starting the recipe.
More information - Simple carrot soup
Source - Vorwerk