I presume this is the stuff that paper xmas decorations are made of, but I hadn't realised you could buy it in sheets for crafty shenanigans. Good old Pinterest enlightened me and the microbe and I have had a go at using it today for a trio of children's 'pop-up' birthday cards.
If you're in the UK and fancy giving it a try, you can get honeycomb paper on Amazon and Ebay. (Mine came from a seller called Lyndie's Craft).
The sheets are a bit smaller than A4 and it seems as though you can cut out pretty much any shape in cross-section in order to get a 3d effect. I expect you could use it to make a garland of paper spheres too.
Well... that's it. A fly-by as promised. Toodle pip.