We all love to eat cakes, and they are sold in very beautiful boxes! You can make a beautiful flowerpot from the cover! The idea is simple!

You need to mix 2 part of cement and 1 part of sand, add water and pour into the form.
When the solution thickens (after 2-3 hours), gently pull out the inner container (I have this pan) and leave to harden for 20 hours.
Then ground it and highlight texture with paints and cover it with varnish.

Video tutorial is here:

Good luck!