One of my favorite craft supplies lately has been barbecue skewers. They work for fucking EVERYTHING and are so cheap. I think I got this pack of 100 for $1, and have used them for everything. Today we're whipping up a little mobile to add a little sumpin-sumpin to the corner of the guest room. Because the guest room was thrown together for $30 in the course of five hours, I try to add shit to it once in a while so that it doesn't feel like our forgotten stepchild.
You will need:
36 Barbecue Skewers - twelve each of 4", 8" and 12"
Glue, something thick and tacky that dries quickly, like hot glue or E600
Black spray paint
You will need twelve skewers for each box. You will need to cut them to size (make sure to snip off the pointy side), but they easily cut through with standard scissors.
To assemble the cube, first you will assemble two squares, using four skewers each. A dab of glue in each corner, held until mostly dry, is what will hold the joints in place. Be liberal with the glue! Once the two squares are dry, connect them into a cube using the four remaining skewers. I'm sorry I didn't get more pictures of the process! It really does require two hands, since most of the time is spent holding the skewers in place as they dry.
A quick hit of spray paint makes them a bit more graphic/disguises any glue joints. I hung them from the ceiling using white string, just because the guest room is all white and I wanted the string to blend into the background, but I also considered using copper jewelry wire, or even fishing line for an invisible look.
Skewers- $1 for 100
Glue - $3.99
Spray paint - $5
I already owned all the materials, so the total for me was free-ninety-nine, but even if you are starting from scratch, the impact feels like more than $10. This would also work well as a baby mobile, if that fits your needs better / if you know any babies who are into Swedish modern.