Bamboo is a decorative indoor plant that comes in many varieties. You can have bamboo plants that are planted in soil, decorative rocks or even marbles. And though bamboo is naturally straight, with a little time you can create a curling, twisting display of bamboo stalks.
Plant your bamboo in a vase and fill it with fresh, clean water. Use rocks or marbles in the vase to hold your bamboo upright in the vase.
Place the cardboard box on its side with the flaps open, so light shines through from only the front. Place it in an area where the open end will be exposed to either natural or artificial light.
Make sure the cardboard box you are using is larger than your bamboo, which will give it room to grow.
Place your bamboo upright in the center of the cardboard box.
Watch for the curving to begin in your bamboo. When the curve is noticeable, rotate your bamboo slightly, noting the direction and amount you turn it.
Wait for your bamboo to begin growing in another noticeable curve. When it does, rotate it in the same way you rotated it the first time. Repeat this process until your bamboo has curled as much as you would like it to.