First look for all the materials together. Then you cut out two rectangles with the scissors, which you stick together as a cross. Alternatively, you can paint up and cut out a cross.
Then put the shirt on and stick the cross on it with a piece of adhesive film.
The disguise is ready. With a doctor's case or some utensils, such as a syringe or bandage, it can now go to the carnival party or you open your veterinary practice in the nursery.
Have fun dressing up!