The toys
Make some holes in the top edge. Cut a few strings from the thin rope. Tie a toy to one end of a piecec of rope, put the other end through a hole and then make a strong knot in it. You can also thread toys onto a string like a pendulum and hang it horizontally.
The scratching post
Attach the end of the sisal rope to the top of the box. Secure it well with a knot and with glue and / or tape. Wrap the rope tightly down around the cardboard and attach the end well.
The rod
Make a hole almost at the top along the side in the box where the stick just fits through (see photo). Move the stick to the bottom of the back corner and attach an interesting toy to it!
Done? Use some catnip spray to make your artwork extra interesting. Of course you can also design something yourself that suits your cat or decorate the box!