Young sorcerers' talent starts to emerge when they are two or three years old.
The level of their power varies greatly and isn't correlated with their intelligence or sense of responsibility.
They copy their parents' abilities but also experiment endlessly in the same way that children play with toys.
Knocking things over at a distance is usually one of the first things they discover but it's not unknown for them to invent more destructive abilities. Also of course they use the power to get things that they want.
Let's just consider the knocking-things-over-at-a-distance ability for the purposes of this question.
A powerful 2-year-old sorcerer could easily knock over an unprepared adult or an equivalently weighted stack of loaded boxes at a distance of 20 paces.
How can these young sorcerers be taken out in public so that a tantrum doesn't become a disaster? We can't lock them up at home in a padded room with no loose objects. In any case they might discover fireballs and burn the house down with them in it.
In this medieval society, Sorcerers and 'muggles' mix freely. They go to the same markets and other public places. Sorcerers mostly trade in magic items and perform spells for money. The legitimate ones are members of the Guild and are forbidden from using magic for evil purposes.