Spray painted them ~ I used yellow and silver (no photos so you'll have to use your imagination ☺)
Glued them together ~ I used gorilla glue ('cause that's what was close) ~ then clamped them together until the glue dried.
Hung them up on the wall ~ by driving a screw through the bottom of a couple of the cans and into a stud (in my beautifully unfinished, windowless, storage/craft hole in the basement ~ and I say that lovingly ☺ ~ which is why the pictures are SO good!)
Finally, I put some yarn in them. I have lots more yarn, but as much as I like coffee, I just can't seem to go through cans that quickly, so I'll be saving cans and adding them in.
Really though, you don't have to put yarn in them ~ spray paint, brushes, whatever your heart desires.