Can you help me make amends?

I stole my friends GameBoy and Pokemon cards when I was a kid. After his parents had taken me in and took care me like their own. I was in the 5th or 6th grade when I did this. I need to tell their father how sorry I am. I want to pay them back but I’m super broke. This has been heavy on my soul but I guess I’ve learned from it and have never stolen from a friend afterwards. Some ideas I have is to contact their dad, (Uncle Brian) and come clean and offer perhaps yard work service (I think that sounds super sketchy, I’m now 24 and in college unemployed) Anyhow, what would you recommend?