Feel free to remove this, mods, if it's too tangential to modern science, but I thought the community might find this early nature vs. nurture hypothesis amusing
It sounds to me it's saying you had to do things like clap your hands to get their attention, gesture to communicate what you wanted them to do, and that you had to do so kindly and patiently or else they may not respond well. Alternatively, maybe it was the children who had to clap their hands and gesture, but then I'm not sure how they'd speak blandishments (kind, gentle encouragements, like "good job!") to others.