We would typically say “Earn your stripes”. In this case, Z had to earn his Nikes by showing his dad that he was able to tie shoelaces on his own.
For the longest time, he was happy to lament that it was difficult. He did not want to try.
The crunch came when we visited United Square a few day ago. Mr H said he could not buy new shoes till he was able to tie shoelaces on his own.