Does a 10 year old need to give Kaffarah if they purposely leave a fast in Ramadan without any valid reason even if they have made the Qaza fast afterwards?
Bismihi ta'ala
If the 10 year old is a female, who has reached her shar'i age of bulugh, then yes, she will need to pay the kaffarah of 'feeding 60 poor', along with doing the qadha' of that day.
If it was a male, then no, he does not.
And Allah knows best.