Passover starts today (in an few minutes or so). When I think of passover I think of matzah balls, and indeed there is a whole slew of matzo math (about halfway down that page) that was posted just a few days ago. But when I did a search on Passover, I also found a bunch of stuff about frogs, presumably because frogs were Plague #2 of the Ten Plagues. And when I thought of frogs, I thought of origami, which is automatically mathy because of all that geometry.
So here are directions on how to make a jumping origami frog! There’s a bunch of photos, so I put them all behind the jump.
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