George W. Hart

This is a modification of my regular polygon slide-together made of thirty squares.  There is a bit more cutting involved, but the result looks cooler.  I recommend this as a two-person activity after doing the others.  It assembles in a similar manner. 

Each part looks like the above, so you can see why I call it the H construction. The template for six per sheet is here. Make five copies so you have thirty cut parts, either all the same color or one sheet in each of five different colors. As with the slide-togethers, you have to bend the paper slightly during construction, but when everything is assembled all the components will be planar.

Here is a view looking down a 3-fold axis. The H shapes are not obvious unless you built it.

And here is one made in a five-color pattern.