Hollow Blocks Empty Bricks

I had blocks like this in childchood. Empty inside. We named them “inflatable blocks” hahaOnly two shapes: triangle and trapeze.They are easy to print. No supports.I tested many PLA filaments like Bambu Lab Basic and Matte, Sunlu Transparent and Stone, Rosa, Spectrum. All worked fine. Boost MeIt makes me motivated to create fun models <3