Traditional Japanese kusudama is one of my favorites, because you do not need to use glue, but you can just sew the flowers together. These flowers are very easy to fold and there are many different options for how to make different kusudamy using the same flowers.
You can use it as a decoration or as a gift. Also recommend doing kusudamy different sizes, small size is more difficult to fold, but they can look a lot more elegant.
Video origami diagram "Traditional Japanese kusudama"