This fold was folded on our 34th wedding anniversary, chosen because a long and happy relationship is not reliant on luck:

This dice is clever is a little obscure – rather than traditional dots each face has a partial coverage of colour.

This is a modular, albeit only 2 modules, each slightly different. Starting with the pony base, layer and colour management results in 6 unique sides and a reasonably nice locking mechanism.

This is from an old Paul Jackson origami book I recently found in our State Library (annoyingly I did not record the title, sorry).