ANSWER:

It’s obligatory to pay zakat for minors and insane people as well as long it reaches nisab and stays for a whole hijab year. 

What is the most authentic opinion concerning the obligation of paying zakatul maal on behalf of minors? I have read that the majority regarded it as obligatory but for example imam Abu Hanifa and sheikh Al Albani did not do so. The arabic word الصبي is used in this regard but to which age refers this? Is this from the birth until puberty?