This is the heart knob for the heart box.

Connector is included that should be super glued on the underside in the space provided.

Original top from the snowflake box with the locking mechanism can be used.

It was printed in black only because i ran out of the red for the image.

Print in whatever color you wish. Easiest way to paint the color onto it is with the height range option. Choose red and touch the top and it should auto paint the height and leave a white outline (or whatever base color base you choose) around the heart.

Enjoy!