Make a small platform by introducing two 90° bends into each end of a strip of cardboard.
Glue this to the top of your box. This will allow you to stack two pairs of servos above the marionette.
Use dabs of hot glue to mount the servos on top of box.
IMPORTANT: Position the motors so that the arms are able to move freely without contacting each other.
Use some double sided tape (or hot glue if you prefer) to attach CRICKIT to the top edge of the box.
Use a pencil to sketch the size and location of the buttons.
Cut holes for buttons using a hobby knife - it's better to make the holes on the small side at first and only widen them if you need to.
Once the buttons are in place, reconnect the quick-connect cables to each button.