Using knife, cut thin slice from bottom of watermelon to provide stable base.
Cut circular piece of rind from top of watermelon big enough to reach into and remove flesh. Carefully remove top section and reserve for use as “lid.”
Remove flesh from inside watermelon using melon baller, reserving melon balls for snacking. Hollow out remaining watermelon flesh and use blender to juice scraps and excess juice.
Using dry-erase marker, draw outlines of eyes, nose, mouth, hair, ears and other features on side of watermelon. If mistake is made with marker, wipe off using paper towel to start over. Following outlines, carve features into watermelon and remove excess rind.
Safe, battery-operated light can be firmly placed inside watermelon to provide haunting glow.
Place circular piece of rind back on top of watermelon.