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Lol, totally read that wrong. They do make just bubble strips. There usually long cylinders like 1/4" thick. You can use the LED ones, and just not plug in the lights as well.
I was in Petco today and I found a hard plastic strip which looked like it had a sponge material in the center. I would image this variety has a million tiny bubbles compared to the wands I found on the net which consist of a weighted tubes in varying lengths. I would think these bubbles would be larger and spaced apart.