Parents brought toys for a baby and baby now never stoped playing with it. Parents decided how to hide toys from the bay. So one day baby’s mom showing the baby k she had thrown toys outside from window by saying that ke kawwa le giya (actually she was hiding behind her hand). On another day surprisingly the baby was really throwing all the toys out of windw. Parents asked ke Oye yeh kiya kar rahe ho. to baby bola k kawwa le gaiyga is liyeh throwing out 
(Just to explain)
The point is that the baby really really knw ke kawwa le giya mean doing mirch jalana and stuff for taking of nazr off etc etc. Since our childhood we c or grand grand grand mother/father aunti etc etc repeatdly doing the same things and its merged in our life and we think its a part in Islam infact its not.
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Well said 