Just bamboo.

bamzoo started with a question: what could a construction toy look like if it used no plastic at all? Bamboo answered it — light, strong, flexible enough to bend into a curve and stiff enough to hold it.

Every kit ships as raw strips, joint pins, and lashing cord. No glue. No molded parts. Just a plant that's been used to build things for thousands of years, cut down to a scale you can hold in your hands.