How can I use them
Some of these uses may apply:
You can build shelving out of them. Cut into them and put boards in the slots. Cover the tubes with something like old book pages and lightly varnish them so they look old.
Use them for concrete molds to make long tubes for edging your yard.
Hi Carla, hope this helps give you some ideas
If they’re thick cardboard, I’d make a Mod Room Screen with them.
First, cut them on a table saw or radial arm saw into 2” sections,
lay them on a non-stick surface (or put plastic under them) and glue them together side to side, on the tangent points.
Hot melt glue would be faster drying time, but one could use construction adhesive.
They would be laid out in a panel of whatever proportions you want.