Did anyone see how to make the pop open treats from the cardboard tissue rolls featured on Martha Stewart?

It was during October when they did the Halloween crafts and decorations. I went home for lunch, turned on the TV and just missed how to make them. The part I missed had something to do with a ribbon or string attached somehow. Martha and one of her camera men each pulled the ribbon or string from each end and, it popped open and the treats fell out. I tried looking on her web site, but I wasn't sure what they were called and my search didn't reveal anything like that. If I can find out how to make them, I thought they would make really cool treat filled stocking stuffers for my kids this year.