Modular origami is the practice of folding many “units” of the same type and then connecting them together into a new new geometric shape. The wreathes are a good example of this, but are a little limited in how they come together.

compressed
partially open
fully extended
A lattice with another shape inside
An inside out lattice
A lattic puzzle
Little projects
Strange shapes
And connections
The paper makes this one
The “little turtle”