This becomes an upcycle project when you use threadbare sheets, old shirts, or towels which aren’t terribly useful as towels anymore. =^.^= If you go with the towels, cut the strips a bit more narrow to make assembly easier. If the strips are less than an inch across and still too snug to push through with no tools, break out a crochet hook! (Or even a bobby pin)
No Sew Rag Rugs Rule!