Here is how you could put together a triangle shaped box made from paper. You need 6 sheets of square paper. 3 colours each. Easily one of the simplest and prettiest origami box designs out there. Try it.
by Mica's Paper Craft Channels
by Sara Ahmad
by Kathleen H
by Surala World - Origami
by Becca Feeken
by 便利ライフハック 【venlee lifehack】
by Origami4ik