Step 1: Materials
1) 13.5 by 7.5 cm yellow double sided paper x8
2) 13.5 by 7.5 cm green double sided papper x4
3) rubber band
4) ruler
5) scissors

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I found this online some years ago and did it with my 3rd grade pupils to be put on the ceiling of our classroom, you can see them (very little) in the photo of the classroom, near the cats' shadows:
http://www.instructables.com/id/Classroom-diorama/
I've used a long green string so I can use it to hang the flower.
And then I did another more or less 200 to complete the ceiling of two classrooms: