Cardboard bicycle

A cardboard bicycle is a bike made mostly out of a special kind of paper called cardboard, which is really just thicker and stronger than normal paper. Think of it like building a fort out of cardboard boxes, but instead of a fort, you're making a bike!

To make a cardboard bicycle, first the cardboard is cut into specific shapes and sizes to fit together perfectly, and then it's glued or taped together to make the frame and other parts of the bike. It's kind of like making a puzzle, but with cardboard pieces instead of jigsaw pieces.

The special cardboard used to make these bikes is really strong, so it can support the weight of a person riding on it. But it's also really lightweight, which makes it easy to pedal the bike and move it around.

Overall, a cardboard bicycle is a really cool invention that helps people ride bikes in a more sustainable and eco-friendly way, since it's made from materials that are biodegradable and don't require a lot of energy to produce. Plus, it's really fun to ride a bike that's made out of cardboard!