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Here are some questions you might explore, or you may have your own questions about the sun or the moon which you would like to investigate:
A paper plate is a good way to show where there are tall trees or buildings on the horizon which you can use for a marker, and where the sun or moon rises or sets. It's also a good way to show sunspots.
You have been given three shapes made out of sponge: a sphere, a cylinder and a cone. Your challenge is to find out how to cut them to make different shapes for printing.
A description of how to make the five Platonic solids out of paper.
This article for students gives some instructions about how to make some different braids.