Diamond Lock Pyramid Blocks

More than twenty years ago, this geometric stacking toy was one of my favorite childhood objects. I still remember the weight of it in my hands and the quiet satisfaction of stacking each layer into place. Recently, my wife asked if we could find something similar for our one-year-old son. I began searching locally in Australia, hoping to recreate that same experience for him. Unfortunately, it was no longer available here. The only option was overseas shipping at a relatively high cost. That moment became the starting point of this project. The result is Diamond Lock Pyramid Blocks, a modular stacking system built around a mathematically precise diamond bipyramid core. The structure follows a 90° locking principle, allowing each layer to interlock smoothly while maintaining structural stability. All edges have been carefully rounded to improve safety and ensure comfortable handling for children. This model is divided into five build plates, corresponding to different block sizes:• 30