Question Summary:
Is one accountable for actions done before the age of puberty?

Question Detail:

 
Before the puberty age, I had done one of the shaytani harkat with another kid who was little younger around 2 years younger than me, I did not do any sex intercourse or neither was intending to do, but not sure why I started doing bad harkat,  he started crying and I did not know what to do, I tried to calm him down and got caught too.
After that other people/relative found out of that incident but I am not sure if I had asked forgiveness for that Incident at that time. But I did salam with them and was scared too.
After that we sort of played together for around two days but there was a glitch in my heart for it, and was always thinking what had I done. Then after few years did meet his parent on the wedding and did Salam and hug but again do not know if I asked for forgiveness for that incident takne place earlier. But his dad despite knowing what happened did greet very nicely and talked with me too. But so far did not get chance to meet their child.
I did feel very bad about it and did repented with Allah swt multiple times on it. But still sometime I get waswasa that I have to ask for forgiveness on it. As if they have not forgave me so far and do not want to forgive, Allah swt can account me on it.  I could call and ask them for forgiveness, but I am only scared if that refresh their memory for it and may remind of something which would no longer matter to them.
I want to know If I need to ask for forgiveness to them by calling as I do not leave in same country, or is it ok to say Salam or call and ask them for forgiveness on it.  So please help me on it.

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
 
You acknowledged the mistake you committed and made tawbah. Be rest assured Allah is Al-Rahman and Al-Raheem (Most Merciful). He will most definitely forgive you.[1] Make a firm intention never to commit that mistake again. There is no need to seek forgiveness from the parents and neither do they expect forgiveness from you. They met you cordially and there were no ill feelings. Forget about the past and continue with your future.
.      
And Allah Ta’āla Knows Best
AbdulMannan Nizami
Student Darul Iftaa
Chicago, USA 
Checked and Approved by,
Mufti Ebrahim Desai.
www.daruliftaa.net