A thick piece of cardboard (you could use a thick notebook cover if you like); green poster colour or felt pen; a rod ( the stick of an old bathroom brush will do); glue and scissors.
1. Draw two identical cacti on the cardboard and cut them out.
2. Colour or paint on one side only.
3. Apply glue on the sides that haven't been coloured and on the top portion of the rod. Place the rod between the two cacti and stick all three together.
4. Fix the rod in a pot which holds a creeper that needs support and wind the vines around it.