Learn how to make a really fun geometric toy—a Hexaflexagon
There are many types of flexagons. The names of flexagons tell the type of polygon and the number of faces. Hexaflexagons are paper polygons you will create in this math minute. They were first discovered in 1939 by Arthur Stone, who set up a Flexagon Committee to investigate their properties.
Snap a picture of your finished project and send it to the EY coordinator in your building.
Info from http://www.auntannie.com/Geometric/HexaHexaFlexagon/