What is Required?
2.5 cm (1 inch) non stretch white tape. If neccessary for small fingers a narrower tape can be used or the tape can be torn along it's length to make thinner strips. A thin strip of padding foam to place between the fingers for comfort and protection.
Apply two strips of 1.25 cm (half inch) white non stretch tape - one above the injured joint and one below. These will provide an anchor from which to attach the supporting strips.
Place the strip of padded foam between the fingers to be taped.
Apply two supporting strips from the two anchors above and below the joint around the 'buddy' finger. This taping should allow the fingers to bend together but sideways movement should be limited.