Some kids will play soccer all day, others will play with rocks. Clearly he has access to a lot of crystals and likely seeded from his parents, yet that said, why should we judge him or his earthly care-takers?
What is he doing wrong?

Nothing. He is a kid, telling a tale and it was very entertaining to watch. Am I going to go out and build me one of these "circular rectangles"? No.
I will also not judge it.


On a lighter note, he has an excellent vocabulary for such a youngster.