3D Swan

Eh, I dont't know this unit's name or who invented it, but many people use it. Easy and spectacular. This is really a unit that anyone can fold, only some patience is nedded. If you haven't tried it yet, search it on DA or YouTube, it often goes by the name "3D origami swan". You'll also find how to assemble, as well as other constructions (like peacock).

I used about 370-400 units (1/64 A/4 paper - the instructions aósaid 1/32, but it's a bigger challenge and the smaller the better...), but it's such a simple and boring one, I don't think I'll do it again any time soon. I gave it to my mum.