Drill a hole on each side using the handheld rotary tool. 6. Outside, spray with varnish, let dry for a few hours. 7. Use needle nose pliers to add jump rings between each skull. Add clasp.

The skull is removed by grasping the incisors with forceps and retracting it outward, leaving a detailed imprint of the rodent skull in the mold (Fig. 1a). Figure 1: Creation of resin mouse skulls.