Square pyramid constructed from a design printed on a single sheet of 110# card stock. Easy and quick to build. Elegant design and quite sturdy. Requires zero-delay booster motor but can use plugged motor if available. With a plugged motor, will retain the motor for the entire flight. Booster motor will self-eject at burn-out. Does not change configuration or deploy a recovery device but instead relies on aero-braking to slow its descent during recovery. I used cream-colored card stock for this build in order to try to emulate the look of sandstone.