How to make an origami cube with a hinged top

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1st picture of origami cube with a hinged top

01.

Let's start with a square paper.

Prepare to "valley-fold" in half horizontally and then unfold.

2nd picture of origami cube with a hinged top

02.

Valley-fold in half horizontally and then unfold.

Prepare to valley-fold in half vertically and then unfold.