Topologically convoluted geometric modulars confuse the brain – shapes that morph into different shapes in stable but seemingly unpredictable ways are fascinating:

This is a wedge-flex – a modular hinged construction of a series of triangular prisms (wedges) that fold, bend, twist and re-align in interesting configurations.

David Brill is known for a love of dynamic geometry, I folded his Double Star Flexi-cube year ago and loved playing with it.

On his website he offers folding schedules for all sorts of designs but this one was added to my “must find time to fold this” pile.

Apart from the wedges (2 flavours), there are 3 different types of hing mechanism, and a rather lovely box designed to contain/store the wedge-flex. Bending it this way and that there are endless configurations – I am still discovering them.