4/17/2019 Hi, Dawn, A year ago (Jun 5, 2018), in response to your question about Waterbomb variations, I mentioned my "Pinless Pin-wheel." Forgive me for incorporating bits of that post now without quotes.
"Pinless Pin-wheel" is diagrammed in OUSA Convention Book 1988, p 243. It was inspired by the Blow-up Rabbit, so I count it as a cousin of the Waterbomb. Origami Database, https://www.oriwiki.com/odbInfo.php https://www.oriwiki.com/showModel.php?ModelID=7100 https://www.giladorigami.com/origami-database/Pinwheel%20Karen%20Reeds The short directions: Make rabbit-ear folds on each flap of the Waterbomb base. Crease the open end firmly horizontally as high up as comfortable. Blow into the hole to inflate the model. The result is a pyramid with 4 vanes. Put a pencil in the hole, blow, and watch the Pinwheel spin. If you use a straw instead of a pencil, blow into the straw and send the Pinwheel flying into the air. [Plastic straws are going out of use for good environmental reasons, so I am laying a supply of paper straws.] (Back in 2002 , Dorothy Kaplan noted that she used a barbecue skewer and didn't bother with the inflating. Still spun around nicely.) This past week I visited a friend who is slowly recovering from a stroke. She couldn't talk much but she enjoyed watching me make the Pin-wheel. I think that puffing on the model to make it spin was probably good therapy for her breathing and talking. Puffing on the straw to make the model jump up in the air was a happy surprise for her. (I also made a bunch of smaller versions as flowers for her.) The series of 3 inflatable models -- traditional Waterbomb, traditional Blow-Up Bunny, and the Pinless Pin-wheel -- was a hit at the April 2019 Princeton Public Library Origami Group meeting. Happy Folding and Puffing! Karen Karen Reeds Princeton Public Library Origami Group Affiliate of Origami USA, http://origamiusa.org/ We usually meet 2nd Wednesday of the month, 6:30-8pm, 1st floor Quiet Room. Free! We provide paper! All welcome! (Kids under 8, please bring a grown-up.) Princeton Public Library info: 609.924.9529 https://princetonlibrary.org/ Next meetings: Wed., May 8, 2019 Wed., June 12, 2019