Hmm, what should one solve there? Just like in the other rooms... simply set the desired/necessary flow rate on the heating circuit distributor... this will then result in the room temperature...
So we don’t have any at all - the hydraulic balancing will hopefully be carried out properly according to the desired temperatures - or what do you mean by children's rooms?
I believe that is an illusion - our heating has been in the screed program in frost mode (rest phase before the next heating cycle) for 2 days, ventilation is done 5 times daily, and the house is still evenly warm. The system is so sluggish that you can no longer implement spontaneous temperature reductions - if it really matters to you, you have to build differently.