Strong glue: super glue, crazy glue, wood glue, gorilla glue, or any glue that's really strong.
4 Wooden legs – approx. 4-6" tall and squatty looking works best for stability.
Paint (optional to paint the legs before you put them on).
Books or heavy objects to weight down the suitcase while the legs dry.
You'll also want a pillow that will fit into the suitcase – which you can also make yourself (see fleece pillows).
And some decorations that you or your cat will love.
Start with a hard shell vintage suitcase.
Get four squatty wooden legs and glue them on each of the four corners of the bottom of the suitcase with your strong glue. (Optional: You can also paint the legs whatever color you choose to match your suitcase or just add a little color).
Place heavy objects such as books or bricks on top of the suitcase to weight it down while the glue dries.
Wait approximately one hour for the glue to dry so the legs are secure.
Now you can decorate the inside top suitcase part with your favorite pictures or decorations.
Put a soft pillow inside the suitcase. I made my own hand-tied pillow out of fleece.