Those are newfangled, lightweight building blocks made of some porous, anechoic material (I yelled at ’em and they didn’t answer back.). They’re predictably better at insulating, but much weaker than good old red bricks – they’re only used for top story walls on a two story houses (or everywhere on a single story).
Raising a family in Thailand // Documenting Issan food, culture, music, and people
Better than Legos!
Glad you have him wear long pants when he’s adventuring out on the back 40’s….so much construction debris around! Nice jungle gym/climbing wall!