“I thought, the cardboard box would make for a perfect rocket ship,” said Cramer, who was assisting a neighbor in their Beaver neighborhood with the appliance. “That box could take us places ...

But pointing out that lightweight cardboard tubes can be tricky to ship without getting crushed, [Concrete Dog] has come up with HEXA, a clever model rocket kit that uses pre-scored cardstock instead.

How about a cardboard rocket ship for your cat or an epic DIY cat castle? You can even decorate the outer edges with non-toxic paint or upcycled fabric to add a personal touch to your creation.

And on Friday, Feb. 28, they will get to showcase their hard work, when dozens of contestants climb aboard a cavalcade of homemade cardboard sleds and rocket down a snow-covered run, usually ...