Anyone else's kid obsessed with building with pallets?

My 10yo boy has decided he's going to build a "fort city" in the backyard using free pallets from behind the Home Depot. First he just stacked them. Now he's got this whole plan with diagrams he drew. It's... actually kind of impressive? And it keeps him occupied for like 6 hours straight.

I'm just monitoring for safety stuff but mostly staying out of it. Might be my easiest weekend ever.