Cardboard Tube Construction Set

I wanted to make something to give another life to those cardboard tubes that come inside rolls of doggie poop bags. I was thinking of those old Tinker Toys that we used to have as kids (ya, I am old). I created a few different options so you should be able to create almost anything if you have enough roll tubes.

The connectors need to be printed with supports, but with some creative layout on your print bed, you can avoid too much extra material.