A cat investigates an origami model made from five coloured papers folded into a spiral and meeting at the point of a pentagonal bipyramid.

Puffy pentagon

This construction is made out of five copies of That Simple Unit (TSU), an origami module attributed to Charles Esseltine. I found this a little tricky to fold and put together, but the end result was very structurally sound.

The fully assembled pentagonal bipyramid.