Just my advice and opinion take it as you want. I have kept fish since I was young and I have found for my son a 20 long to be great for the fish he wanted. I have never used a kit and primarily due to my preferences of quality I am use to. I found an aqueon 20long with the Brooklyn stand from petco works great for me and then heated with a 150 aqueon pro. For his tank I use 2 fluval 5-20gal hob filters and a fluval aqua sky led light. This is a planted tank as well so any light may work in this case. Don't give up tho he will love it and become more involved as time goes by. And watch out for MTS it is real I have it 25 tanks and counting lots of projects with breeding and growing plants. It is something you may find yourself wanting to do alone as well. Of course work on his tank with him first it is so rewarding watch your son take pride in his tank.