What interesting thing can I do with some strong cardboard tubing? Besides mail posters or build a telescope? I have 3 pieces between 2-3 feet each and 3” inner diameter. It was a single large 7 foot tube I broke up to recycle but now I feel like I should do something with them
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spring or maybe some kind of heavy duty inner elastic strap (like a souped up one of these youtu.be/vbzeupR0F9I)
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