Green Onion

At my mother's assisted living home, the staff helped my mom and other residents put in a small garden in the spring. Onions, featured in the planting, are now being enjoyed by all. Mom says they are past that first delightful small green onion stage; the bulbs are getting bigger, and the tops thicker and stiffer. Which takes her back to childhood, and some creative onion engineering.

Mom says when she was young, and the onions got to this point, they would cut off a top to use as a bubble blower. They would cut off the top end of the green stalk, and make slits on the bottom end so the it could be curled and feathered out. Then they would use this with soapy water mixed up at home to blow bubbles. "Of course," she said, "you made sure you didn't bite into it! But that's how it was back then. We made all our toys." Mom says her dad showed them how to do this.
Any of you out there have a similar onion stalk bubble blower story from your elders? I'd love to know. I wish I had some onions growing in my backyard right now. I would love to try this out. If you are growing onions, why not give it a test and let me know how it goes? I'd be particularly interested in how the modifications to the bottom end of the tube affect bubble production.
Just remember not to bite into it!