My sister just sent me this awesomely complicated origami (the purple one above). You can read about how she makes them here. Although this specific one isn’t there, I don’t know how she did it. I suspect mathematical wizardry.
The one below isn’t as complicated but I think it is very pretty because of the patterned paper. I have had this one for a while. If I remember correctly my sister folded all the bits of paper and let me put it together. What a nice big sister.